Sorry for the lousy quality, put sound on to see exactly when I start and end the simulation. On the right is 4.14 and on the left is 4.13, both of these are blank blueprint projects.
I forgot to include it in the video but testing all the play modes:
- Selected Viewport = lag
- Simulating new window = no lag
- Standalone game = no lag
- Simulate = lag
So I am guessing the issue is within the viewport somewhere? I have no idea how to debug or reproduce this bug since this is running a fresh install of 4.14 and I have also tested a fresh install of 4.14 on my other computer and it works fine.
So the other thing I’m suspecting is that something from the previous version is getting carried on to the new 4.14 install? The only thing left for me to try is to remove all the UE4 versions completely and reinstall it which I may try later (Australia internet is a tad bit slow).
So in summary I would suspect the bug is either:
- an editor setting or plugin (I looked through plugins though) that somehow got carried over
- an issue with simulating in selected view port
Video: - YouTube