Hello and sorry to bump such an old thread but I have the same issue and I tried litterally all the options given on the answerhub (delete saved and intermediate folders, make a new project, edit the various .ini files, etc.), including those you specify here Tim but the problem is still there and I cannot solve it … And now it is on every project I have, although it only shows up with .fbx format, but the weird thing is I used to import .fbx and there was no issue before so I am kinda lost here …
I am using UE4.12.5