Initial Error: Occured with some conflicting plugins/terrain editor plugins which I have disabled to mitigate the problem.
Regardless of adjusting brush size of each tool, adjusting strength, adjusting pivo position, snapping, etc., nothing seems to work or help fix the issue.
So far I have tried the following:
Restarting my device several times
Uninstalling → restarting → reopening
Disabling all plugins I have related to terrain customization
Disabling any terrain updates in studio beta features
Testing on separate places in which the bug did not occur initially (still did not work)
If there is any solution to the problem, please let me know below.
TLDR: Go to the manual plane lock mode and make sure that you hit the apply button. A fix that prevents this problem from happening at all is in the works.
If this is not the solution, please send me your output log if there is one. If there is not output in the console, I can move this conversation to a DM to further diagnose your issue.