Timeline Error / Colored chessboard

Hi there, i just installed the Final cut pro trail version. It worked for around 1h.

I importet some dji phantom footage (4k) and edited the footage. I did some color correction with "color final" and the "M31 plugin". Then i tried to zoom in and out (into the timeline). As a result i just found an ugly colored chessboard as you can see in the attachement. After i had restarted the app the error appeared in differnt color each time.

Also I have got a brand new macbook pro 15 2,5ghz intel core 7 quad core, which is just 2 days old.

I waited until the background wheel showed 100%

I reopened the fcpx several times

I restarted the macbook

I created a new project and i duplicated the project but the weird colors appeared again

I even reinstalled final cut pro x

....

Dear final cut pro users, how can i fix that problem ?

Thanks

Johannes