I have had some issues in the past with symbols created in 11.1 corrupting in 11.5. It has been suggested to recreate new symbols freshly in 11.5.
I just spent 1.5 days creating a large handful of 3D symbols freshly in 11.5. So far, everything has been working fine, and drawings appear normal.
This morning, I opened up a drawing I was working on last night, and virtually every symbol is totally corrupted as VW has spewed all the geometry of the symbols all over the place!!
I have just wasted a huge whack of time here, I have deadlines ... and I am very upset. Please, is someone looking into this problem, or am I the only one??!!