VST3 regularly blacklisted by Ardour 6.7

[ghost]

Running sfizz-git r3699.ce2170c8-1. Often when creating a MIDI track in Ardour 6.7 I will only see the LV2 version (which crashes Ardour when opening the SFZ file). Clearing Ardour's plugin blacklist works but it is only a matter of time before it disappears again.

[jpcima]

If I read the Ardour code correctly, the blacklisting is a result of a failure to scan the plugin, or something to do with Ardour's cache file.
I don't know much else, but a log might be helpful perhaps.

[paulfd]

For anyone seeing this, feel free to reopen with more information if you encounter this !