It happens a misterious think with display schemes.
The scheme works but all nets colors becomes white!!!!!
Specialy after a crash...
Did they really change in the Net tab of display control too?
Have you verified, that all net colours changed or are (for some unknown reason) all nets the same net?
I had the last one with breakout traces, wich became all (net0).
If reproducable, you should open a defect.