Issue Description:In After Effects 2025 (v25.x), whenever I switch from one project file (.aep) to another, the preview engine glitches. Specifically, Adaptive Resolution stops functioning, and Idle Cache (Background Rendering) completely freezes.
Previously, the only way to restore these preview features was to restart the After Effects application entirely. Standard purges via Edit > Purge > All Memory did not solve the issue.
Steps to Reproduce:
- Open a project in After Effects 2025.
- Switch to another project (via
File > Open Projector recent files). - The preview engine fails: Adaptive Resolution is ignored, and background idle caching no longer triggers.
Solution / Workaround:
I found a permanent fix that does not require restarting the app. If you are facing this exact bug, do the following:
Go to Preferences > Startup & Repair and click "Clear All Caches".
This immediately flushes the corrupted launch/system-level cache that causes the conflict during project switching. Both Adaptive Resolution and Idle Cache instantly start working properly again.
Hopefully, the development team can investigate why the rendering engine fails to release or refresh these core system caches when switching projects in AE2025.
Environment:
win11 AE25.6.4
AdChoices