Krita crashes and lags after update to 5.1.1

I have been using Krita for about 6 weeks, and it was working great until the update to 5.1.1 was pushed. Now, the performance is excruciatingly slow most of the time, and the app crashes frequently. Since the Krita crash logs don’t work with flatpak installs, I’m not sure what logs/info to include here, so please let me know what additional info might be helpful.

  • Pop!_OS 22.04 LTS, 64-bit (Krita installed and updated via Pop Shop).
    • Windowing: X11
    • Gnome: 42.4
  • System76 oryp6
    • NVIDIA Corporation TU106M [GeForce RTX 2060 Mobile]; switchable graphics set to hybrid; I have tried launching normally (integrated) and also using discrete; this doesn’t appear to make any difference.

File an issue directly with the flatpak