Tested this with 19.04RC1

1. Page instructions appear in HTML, including an embedded image.
2. Page instructions appear in Leap2A but without the embedded image.
3. Peer assessment instructions do not appear in the HTML export (see portfolio_html_peer_assessment_completed.zip).
4. Peer assessment instruction do appear when the Leap2A export is imported again and also bring an image along.
4. When trying to import a portfolio with a peer assessment block filled in (portfolio_leap2a_peer_assessment_completed.zip), the following error message occurs:

[WAR] d7 (lib/adodb/adodb-exceptions.inc.php:45) Array to string conversion
Call stack (most recent first):

    log_message("Array to string conversion", 8, true, true, "/home/kristina/code/mahara/htdocs/lib/adodb/adodb-...", 45) at /home/kristina/code/mahara/htdocs/lib/errors.php:520
    error(8, "Array to string conversion", "/home/kristina/code/mahara/htdocs/lib/adodb/adodb-...", 45, array(size 7)) at /home/kristina/code/mahara/htdocs/lib/adodb/adodb-exceptions.inc.php:45
    ADODB_Exception->__construct("postgres8", "adodb_throw", -1, "ERROR: null value in column "block" violates not-...", "INSERT INTO "artefact_peer_assessment" ("assessmen...", array(size 3), object(ADODB_postgres8)) at /home/kristina/code/mahara/htdocs/lib/adodb/adodb-exceptions.inc.php:80
    adodb_throw("postgres8", "adodb_throw", -1, "ERROR: null value in column "block" violates not-...", "INSERT INTO "artefact_peer_assessment" ("assessmen...", array(size 3), object(ADODB_postgres8)) at /home/kristina/code/mahara/htdocs/lib/adodb/adodb.inc.php:310
    ADODB_TransMonitor("postgres8", "adodb_throw", -1, "ERROR: null value in column "block" violates not-...", "INSERT INTO "artefact_peer_assessment" ("assessmen...", array(size 3), object(ADODB_postgres8)) at /home/kristina/code/mahara/htdocs/lib/adodb/adodb.inc.php:1281
    ADOConnection->_Execute("INSERT INTO "artefact_peer_assessment" ("assessmen...", array(size 3)) at /home/kristina/code/mahara/htdocs/lib/adodb/adodb.inc.php:1241
    ADOConnection->Execute("INSERT INTO "artefact_peer_assessment" ("assessmen...", array(size 3)) at /home/kristina/code/mahara/htdocs/lib/dml.php:1102
    insert_record("artefact_peer_assessment", object(stdClass)) at /home/kristina/code/mahara/htdocs/artefact/peerassessment/lib.php:263
    ArtefactTypePeerassessment->commit() at /home/kristina/code/mahara/htdocs/artefact/peerassessment/import/leap/lib.php:180
    LeapImportPeerassessment::import_using_strategy(object(SimpleXMLElement), object(PluginImportLeap), 1, array(size 0)) at /home/kristina/code/mahara/htdocs/lib/mahara.php:1817
    call_static_method("LeapImportPeerassessment", "import_using_strategy", object(SimpleXMLElement), object(PluginImportLeap), 1, array(size 0)) at /home/kristina/code/mahara/htdocs/import/leap/lib.php:665
    PluginImportLeap->import_from_load_mapping() at /home/kristina/code/mahara/htdocs/import/leap/lib.php:188
    PluginImportLeap->process() at /home/kristina/code/mahara/htdocs/admin/users/add.php:348
    adduser_submit(object(Pieform), array(size 25)) at /home/kristina/code/mahara/htdocs/lib/pieforms/pieform.php:544
    Pieform->__construct(array(size 8)) at /home/kristina/code/mahara/htdocs/lib/pieforms/pieform.php:166
    Pieform::process(array(size 8)) at /home/kristina/code/mahara/htdocs/lib/mahara.php:5412
    pieform(array(size 8)) at /home/kristina/code/mahara/htdocs/admin/users/add.php:156

[WAR] d7 (lib/errors.php:858) Failed to get a recordset: postgres8 error: [-1: ERROR:  null value in column "block" violates not-null constraint
DETAIL:  Failing row contains (116, null, null, 11, 0).] in adodb_throw(INSERT INTO "artefact_peer_assessment" ("assessment", "view", "private") VALUES (?, ?, ?), Array)Command was: INSERT INTO "artefact_peer_assessment" ("assessment", "view", "private") VALUES (?, ?, ?) and values was (assessment:116,view:11,private:0)
Call stack (most recent first):

    log_message("Failed to get a recordset: postgres8 error: [-1: E...", 8, true, true) at /home/kristina/code/mahara/htdocs/lib/errors.php:95
    log_warn("Failed to get a recordset: postgres8 error: [-1: E...") at /home/kristina/code/mahara/htdocs/lib/errors.php:858
    SQLException->__construct("Failed to get a recordset: postgres8 error: [-1: E...") at /home/kristina/code/mahara/htdocs/lib/dml.php:1105
    insert_record("artefact_peer_assessment", object(stdClass)) at /home/kristina/code/mahara/htdocs/artefact/peerassessment/lib.php:263
    ArtefactTypePeerassessment->commit() at /home/kristina/code/mahara/htdocs/artefact/peerassessment/import/leap/lib.php:180
    LeapImportPeerassessment::import_using_strategy(object(SimpleXMLElement), object(PluginImportLeap), 1, array(size 0)) at /home/kristina/code/mahara/htdocs/lib/mahara.php:1817
    call_static_method("LeapImportPeerassessment", "import_using_strategy", object(SimpleXMLElement), object(PluginImportLeap), 1, array(size 0)) at /home/kristina/code/mahara/htdocs/import/leap/lib.php:665
    PluginImportLeap->import_from_load_mapping() at /home/kristina/code/mahara/htdocs/import/leap/lib.php:188
    PluginImportLeap->process() at /home/kristina/code/mahara/htdocs/admin/users/add.php:348
    adduser_submit(object(Pieform), array(size 25)) at /home/kristina/code/mahara/htdocs/lib/pieforms/pieform.php:544
    Pieform->__construct(array(size 8)) at /home/kristina/code/mahara/htdocs/lib/pieforms/pieform.php:166
    Pieform::process(array(size 8)) at /home/kristina/code/mahara/htdocs/lib/mahara.php:5412
    pieform(array(size 8)) at /home/kristina/code/mahara/htdocs/admin/users/add.php:156

[WAR] d7 (lib/dml.php:1105) Failed to get a recordset: postgres8 error: [-1: ERROR:  null value in column "block" violates not-null constraint
DETAIL:  Failing row contains (116, null, null, 11, 0).] in adodb_throw(INSERT INTO "artefact_peer_assessment" ("assessment", "view", "private") VALUES (?, ?, ?), Array)Command was: INSERT INTO "artefact_peer_assessment" ("assessment", "view", "private") VALUES (?, ?, ?) and values was (assessment:116,view:11,private:0)
Call stack (most recent first):

    insert_record("artefact_peer_assessment", object(stdClass)) at /home/kristina/code/mahara/htdocs/artefact/peerassessment/lib.php:263
    ArtefactTypePeerassessment->commit() at /home/kristina/code/mahara/htdocs/artefact/peerassessment/import/leap/lib.php:180
    LeapImportPeerassessment::import_using_strategy(object(SimpleXMLElement), object(PluginImportLeap), 1, array(size 0)) at /home/kristina/code/mahara/htdocs/lib/mahara.php:1817
    call_static_method("LeapImportPeerassessment", "import_using_strategy", object(SimpleXMLElement), object(PluginImportLeap), 1, array(size 0)) at /home/kristina/code/mahara/htdocs/import/leap/lib.php:665
    PluginImportLeap->import_from_load_mapping() at /home/kristina/code/mahara/htdocs/import/leap/lib.php:188
    PluginImportLeap->process() at /home/kristina/code/mahara/htdocs/admin/users/add.php:348
    adduser_submit(object(Pieform), array(size 25)) at /home/kristina/code/mahara/htdocs/lib/pieforms/pieform.php:544
    Pieform->__construct(array(size 8)) at /home/kristina/code/mahara/htdocs/lib/pieforms/pieform.php:166
    Pieform::process(array(size 8)) at /home/kristina/code/mahara/htdocs/lib/mahara.php:5412
    pieform(array(size 8)) at /home/kristina/code/mahara/htdocs/admin/users/add.php:156