You know the GMod developers ♥♥♥♥ up so badly that not even Silverlan's SNPCs work properly anymore, what did they do? well, I'll tell you... they did the unneccessary and discontinued functionality of entity:Disposition - instead turning it in to NPC only, this is causing upvalue problems with Silverlan's entity:Disposition() remake and also causing a stir ( or has previously ) with DrVrej's SNPCs and my own, luckily, we have not suffered such a severe fate as Silverlan who unfortunately won't be back to fix his addons by the looks of the situation.

So why did the developers decide to REMOVE functionality over all entities for Disposition? maybe you should ask them, also... remember to laugh at their appallingly bad excuse.