I just tried to reproduce this with xubuntu 20181017. I couldn't - see the attached screenshot.
One difference is that I was using amd64 and not i386.
This is the error bucket: https://errors.ubuntu.com/bucket/?id=/usr/bin/gnome-software%3A6%3Ag_assertion_message%3Ag_assertion_message_expr%3Ags_plugin_loader_pending_apps_add%3Ags_plugin_loader_process_thread_cb%3Ags_plugin_loader_process_in_thread_pool_cb
I just tried to reproduce this with xubuntu 20181017. I couldn't - see the attached screenshot.
One difference is that I was using amd64 and not i386.
This is the error bucket: https:/ /errors. ubuntu. com/bucket/ ?id=/usr/ bin/gnome- software% 3A6%3Ag_ assertion_ message% 3Ag_assertion_ message_ expr%3Ags_ plugin_ loader_ pending_ apps_add% 3Ags_plugin_ loader_ process_ thread_ cb%3Ags_ plugin_ loader_ process_ in_thread_ pool_cb