Regression: Tested in //UE5/Release-5.0, this issue does not occur so regression is yes.
The GPU Timeout only occurs in UE5/Release-5.1, as recreating this issue in previous versions of the editor does not result in any freezing or GPU Timeouts.
Actual Result: Editor starts freezing and logs start warning of a GPU Timeout
Expected Result: No GPU Timeout occurs and the Editor does not start freezing
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-171647 in the post.