Preview is stuck in a loop and is unresponsive

Same thing. Won't stop! MacBook Pro. Catalina.

Ditto, having the exact same issue as everyone else. Ram Preview is completely unresponsive and has a mind of its own... v17.1.1 - Am using 1080ti and have tried rolling back drivers and swapping from Nvidia Studio to Game Ready drivers, and nothing seems to work.

This is the same problem of another more voted request. Please, bring your vote to there:
https://adobe-video.uservoice.com/forums/911311-after-effects/suggestions/39838078-preview-is-stuck-in-a-loop-and-is-unresponsive

This occurs only when I have any layer keyframes actively selected when I press spacebar. It loops indefinitely and I can't end the preview.

So I am using a NVIDIA Quadro P5000, downloaded and installed the new driver from 6/24/2020.
Version (451.48)

This has corrected the Preview problem in After Effects for me at the moment.

Thank you NVIDIA.

Come on guys! I work every day with this tool. Hope you'll fix it soon. Luckely for me i'm used to save constantly my progress (: but it's frustrating have to close it for this issue

Hi Guys .. I purchased CC product recently. I am beginner. Ae preview never stops and hang the application even for 5 sec composition. It worked well for few weeks and now its giving trouble. I tried my best to resolve but its not working. I want go away from this cc. I have 16 GB ram machine. I don't want to change any settings/graphics just to work with Ae. As per Adobe system pre-requisite my machine is perfectly fine. Its a bug. My other animation software Autodesk Maya works perfectly fine.

This is an NVIDIA driver issue - install an older Studio Driver or switch back to GeForce Game Ready (recommended) -- problem should resolve.. Good luck!

Hello Jesse,

We have identified a bug with the latest studio Nvidia Drivers, and it looks like this is the source of your preview issue. I would recommand updating to the latest "gamer ready" drivers.

Hope this helps,
Sebastien

The new update is full of bugs. Every time I preview a comp AE gets stuck in playback and I can't stop it. AE has been the most reliable and least faulty app Adobe has made. Please don't break it too.