Audacity flatpak 3.6.4 starts and freezes

Hi,

I use Linux Mint 21.3 (based on Ubuntu 22.04) with an Nvidia Geforce GTX 560M and org.freedesktop.Platform.GL.nvidia-390-157 version 1.4 runtime.
I have 18 flatpak applications running correctly.
All flatpak applications and runtimes are up-to-date.
**I can install Audacity 3.6.4 flatpak and launch it.
But It freezes on the title window "Audacity" and stays on this window, with nothing else happening, and I have to shut it down with system monitor by killing process.**
When I launch it from the command line, no error message.
AppImage version of Audacity 3.6.4 from audacityteam.org does work.

Regards,

MN

Reproduce the freeze with the Audacity 3.6.4 Flatpak on the reported Linux Mint, Nvidia, and runtime setup, first launching it from the command line as described. Compare that behavior with the working AppImage and use the result to identify the Flatpak-specific cause; done means the Flatpak reaches the application window without freezing.

Written by the indexing model from the issue text.