[13:14:07] [Client thread/WARN] [opencomputers]: Gosh I'm popular! Too many tabs were added to the OpenComputers in-game manual, so some won't be shown. In case this actually happens, let me know and I'll look into making them scrollable or something...

Found this in the log while looking for persistence error with the screens. Just following the instruction by reporting that.

Mods :

• Commons0815-1.12.2-1.4.0.jar
• Computronics-1.12.2-1.6.6.jar
• foamfix-0.10.14-1.12.2.jar
• jei_1.12.2-4.16.1.302.jar
• malisiscore-1.12.2-6.5.1.jar
• mcjtylib-1.12-3.5.4.jar
• Mekanism-1.12.2-9.8.3.390.jar
• MekanismGenerators-1.12.2-9.8.3.390.jar
• ocdevices-MC1.12.2-1.0.0-44.jar
• OpenComputers-MC1.12.2-1.7.7+5413028.jar
• OpenPrinter-1.12.2-0.1.0.16.jar
• OpenSecurity-1.12.2-1.0-83.jar
• OptiFine_1.12.2_HD_U_G5.jar
• performant-1.11.jar
• SGCraft-2.0.5.jar

After seven and a half years, someone has finally managed to hit this issue!

After seven and a half years, someone has finally managed to hit this issue!

or no one saw this message or bothered to report it

I hit it once, but I didn't think to report it because I thought it was an issue with a different mod (⁠⊙⁠_⁠◎⁠)

I may actually be hitting this and never noticed (I generally don't read logs unless there's a crash). I have a lot more addons than the OP.