Dual Vega 64 and FCPX on 10.15.2

[sashamed]

I have few problems with dual Vega 64 on 10.15.2 

1. Mac OS does‘t boot with all 3 monitors (2560x1440). Before booting, I have to turn off 2 monitors. With 10.14.6 everything worked fine. I tried to put graphic drivers from Mojave in clover, than boot Catalina. It works fine, but....

2. FCPX (if not crush) render slower, and become unstable

3. FCPX is crushing every time when start render BruceX test.

 

With single Vega 64, everything works fine, but can‘t boot with 3 monitors.

Boot with 3 monitors works fine on 10.14.6.

 

Any suggestion? (except put out second Vega)