ver 3.0.0 Getting Internal Error on Shutdown, then failure to restart

Love Audacity - fyi, eager to try v3 so installed it from flatpak: seems to be some DB connection interfering with shutdown.

Linux: MX-19.3, Kernel 4.19.0-6-amd64 x86_64
Audacity version: 3.0.0
Installation from flatpak

Maybe a flatpak implementation but my operations is:

  1. Save (creates fixed .aup3 file and .aup-wal files)
  2. Close, or Exit produces the following message.
    “Internal error at DBConnection.cpp line 275.”
  3. Program does not terminate normally. If I try to close the GUI window “x” after a “File → Close” I get a “This window might be busy and is not responding - do you want to terminate” message. If I select “No” the app freezes. If I select “Yes” the GUI disappears, but Audacity seems to up its CPU requirement (judging by top).
  4. Thereafter, I get a variable response on restart. Initially it just wouldn’t restart (encountered a fatal error), then I cleared the cache in my home directory and it fired back into life. Subsequently, I get crash recovery options (after a kill termination, which is usually inevitable regardless).

My guess is that it probably is. I don’t see those problems when Audacity 3.0.0 is built from source.