I believe crossfire is still not disabling properly and is acting strange for all dx 9 titles.
All dx 9 games on the r9 295x2 are still having issues with judder and hitches, flashing shadows, flashing lighting. I have a feeling all these issues are crossfire related even when it is disabled.
In rfactor 2 having crossfire on I have fps way up over 200fps. Disable crossfire and I get 30-60 fluctuating with the same stutters and hitches that are there with crossfire on.
This is 100% driver issues and they need looking at properly. Crossfire might appear like it is disabled but It seems it maybe not still working as it should. The temps on the disabled card still can get higher than the card that is being used.
A single card from the r9 295x2 should be running rfactor up over 100 fps not at 30 with v-sync off.