AI Denoise checkbox immediately unticks

 AI Denoise checkbox immediately unticks until full system restart.

  Description In Lightroom Classic,
AI Denoise cannot be enabled on eligible RAW files. When the Denoise checkbox is ticked, it immediately unticks with no error message.
Restarting Lightroom alone does not always resolve the issue; a full system restart is required.
After restart, AI Denoise works normally again.  Steps to reproduce  Use Lightroom Classic for an extended session (file moves, preview building, culling).  Select a supported RAW (.ARW) file.  Open AI Denoise.  Tick “Denoise” → checkbox immediately unticks.  Expected result Denoise remains enabled and Enhance proceeds.  Actual result Checkbox immediately unticks with no feedback.  Workaround Full system restart.

lightroom clasic 15.0