Hammer randomly breaks saves on the fly!

[HQDefault]

So, I'm working on an artpass for hangar, I've been working on B4 for weeks and weeks, just a few days away from the last compile by now. A few times in the past, hammer trolled with me by changing the orientation of textures, and stuff like that. But THIS is the straw that breaks the camel's back. IT CANCELED OUT EVERY BRUSH ENTITY. Every brush-based entity was transferred back to a solid. Absolute bullshit. What the hell is causing this? How the hell do I stop it?

 

[chemelia]

It's possible that you have "Solids" chosen in select window on the right. It displays every brush with the world solid properties. As for texture orientation, I don't know what could cause that.