Version 7.8 and 8.0 crashes KeePass when editing templates on Linux

[jfabini]

A reproducible issue that seems to affect Linux only (Linux Mint 19.3 (64 bit), KeePass 2.44, KPEntryTemplates 7.8 and 8.0) that may or may not be related to https://github.com/mitchcapper/KPEntryTemplates/issues/64

When opening an existing password database and trying to edit a KPEntryTemplate template on Linux, Keepass crashes deterministically. The KeePass window disappears but its process must be killed in order to be able to restart KeePass. The following steps are needed: Start KeePass, enter the KeePass database password. Select the Template folder, open an existing template (the focus is, as it has ever been, on the "Template" tab, but the displayed tab is "Entry"). Click on the "Entry" tab, then on the "Template" tab again - this crashes the KeePass app, the Window disappears.

When creating a new template from the scratch it works until "Init as a template" is clicked. Then KeePass asks about saving unsaved changes and exits (but, again, hangs and must be killed).

Instantiating entries from existing templates, however, works.

I tried the identical command sequence with an existing and with an newly created database - same reproducible behavior: crash. On Windows 10, 64 bit the same command sequence works as expected.