Client Crash - java.lang.NullPointerException: Tesselating block model

[rckymtnrfc]

I'm seeing the following crash occasionally when I'm working with Catwalk 4 blocks.

https://pastebin.com/YxCU52V9

Forge - 2710
Catwalks 4 - 4.0.42

[OhiraKyou]

Just experienced the same thing with OptiFine installed and the OptiFine support config variable set to true. Had the SEUS Renewed 1.0.0 shader pack active.

Made a 3x3 platform of classic catwalks with a classic ladder below the middle catwalk in creative mode. Right-clicked the center of the middle catwalk with the blowtorch to hide its floor. Was able to load back into the world and right click the floor to bring the catwalk's center back. Right clicking again caused another crash.

Forge: 14.23.5.2807
OptiFine: 1.12.2_HD_U_E3
Catwalks: 1.12.2-4.0.44

Crash report: https://pastebin.com/8rd48tUQ