Hey, I’ve just started noticing this issue while working on a map with smooth terrain today.
I normally have almost every beta feature enabled, including the updated Terrain Editor. Using it makes my frame rate drop down especially when having one of the Edit tools selected (it’s a little worse when using them). A quick fix I did was to just disable the Terrain Editor beta feature which eliminates the lag issue.
Here’s my laptop’s system information:
Windows 11
CPU: Intel(R) Core™ i7-9750H CPU @ 2.60GHz
Memory: 16.0 GB
GPU: NVIDIA GeForce GTX 1660 Ti
Below is an attached video showing the FPS drops & a microprofiler dump: