Forge version: forge-1.12.2-14.23.1.2587
Botania version: Botania r1.10-353 (I install v347 for first time and continue update until this version)

The game does not respond (Time out on server) when I made Terrasteel ingot (after
I throw material on Terrestrial Agglomeration Plate).
I play on Own Server with Hamachi, The server don't have any issue and just report me lost connect because time out.
I must stop client and join again every time I made it. (the game just does not respond, don't crash, don't have crash log)

Ps. but I can made it normally in Botania r1.10-347 to 352 (but sure, them for forge 1.12.1 and It has many problem for 1.12.2)

can you get some logs on either the client or server?

Ehmm, is your bug something like that? xD (hard fps perma drops + that in the right corner)
Botania+r1.10-354 + Forge 1.12.2 - 14.23.4.2705 + more

https://gist.github.com/belathus/2f5dcb9ef070381a0feb351ae1c48025

I don't know if it is related, but when I make terrasteel, I get the above crash report. VanillaFix catches the crash, but it continues to crash. I basically get trapped in a crash cycle as VanillaFix keeps catching the crash.

this is will be fixed in the next release, sorry about that.

VanillaFix should have an option to disable crashing and to just log a warning.

I used it. Thanks, sir.