I have just tested the behavior on Blake's bugsquash2 test server using https://bugsquash2.mobiusconsortium.org/eg2/cs-CZ/staff/acq/po/8 (a purchase order entitled "Čeština - test". Using the search interface (https://bugsquash2.mobiusconsortium.org/eg2/cs-CZ/staff/acq/search) I can confirm that when one searches for a purchase order name starting with Čeština (uppercase Č), the line items are successfully found but when čeština (lowercase č) is searched for, no results show up.
I have just tested the behavior on Blake's bugsquash2 test server using https:/ /bugsquash2. mobiusconsortiu m.org/eg2/ cs-CZ/staff/ acq/po/ 8 (a purchase order entitled "Čeština - test". Using the search interface (https:/ /bugsquash2. mobiusconsortiu m.org/eg2/ cs-CZ/staff/ acq/search) I can confirm that when one searches for a purchase order name starting with Čeština (uppercase Č), the line items are successfully found but when čeština (lowercase č) is searched for, no results show up.