Forge version: 34.1.19
Quark version: Quark-r2.4-267
Oddities version: QuarkOddities-1.16.3
ARL version: AutoRegLib-1.6-46

Crash report: https://pastebin.com/xs2UU6Fy
Latest log: https://pastebin.com/zjVbk2tZ
Debug log: https://pastebin.com/ZXdR2FP4

Getting this crash while trying to push Quark signs with a piston. The vanilla sign can be pushed normally; it's just the Quark variants.

wait, what sign types does Quark add...?

Shoot dang you're right. I forgot those were vanilla. Anyway, the oak sign could be pushed fine, but not the dark oak sign. no idea why

Yea, I just double-checked, and it only crashes with the non-oak vanilla signs, including the two new 1.16 signs.