unusable terrain paints

I have an INSANE amount of lag when using terrain paints and I had no issue before 0.34


Video
https://drive.google.com/file/d/1rKUBeRCqYvNaxgLfwumHmQXO6A3MhhRP/view?usp=sharing
--- Post updated ---
please fix this devs this make it almost impossible to do map making for now

 

Check the console (`) for errors, it was spamming errors for me, after fixing them the lag disappeared

 

is it a cache error? I am having issues figuring this out

 

It seems like are problems with the terrain textures, also how big is your map?

 

The map is 8192

 

I have the same problem and cannot progress. What is the work now?
Has anyone found the solution?

 

I'm surprised there are not more posts on this. My level (4096) is not workable with this problem either. The lag causes random bits of terrain to suddenly appear where I don't want them. Only started after .34 update. Tried deep cache cleaning, safe mode, nothing works. Vanilla maps seem unaffected so I'm guessing it is a code change affecting our maps.

Update:
digging deeper I saw missing texture errors and found that some of my materials were missing pieces. The lag was caused mostly by missing base map layers. There is still more lag now than before the .34 update (I am using 23 terrain layers) but at least it is now workable. Hopefully this helps someone else with similar issue.