Try this: Go INTO the "HookGenPatcher.cfg" file in "...BepInEx\config\". Find and delete "assembly_steamworks.dll" string. Just this! Save before leaving.
It works for me... I use PlanBuild and with the game update it's now functional. Maybe this fix another mods bugs. This manipulation fix also, in the launcher, the many and many bug's line showing.
I want bring precision about this "bug". It's majoritary with the PAINT TOOL of plan build. With the simple toe tool, it's almost ok but sometimes this bug apear. So. Thanks for your reply. I had test this mod (AdvancedTerrainModifiers) and the dev fonction OPPTERRAIN (maybe incorectly) but that's can't solve the problem. I think it's an mix of my few mods (I share list of them) and certainly due by all my contruction because my field is very full. For the moment, I glitch with the simple hoe tool. It's not the best way but that's do the job... ;)
Thank you for your reply! I tested few solutions but I think it's probably the many mods I use wich cause that. I found an "solution" for can modify the ground correctly. I simply use the hoe ;). It's always buged with terraform planbuilt tool for modify the paint style but the other tools work correctly.