gfx bug? text for buttons R/W etc disappears in mixer

Problem 1: See screenshot.
This happens alot since I updated to v7.0.5. The Cubase-executable uses about 900 MB of memory… so it can’t be that. If I reload project the text will come back.

Problem 2: All the mixer channels gets down to zero/-- dB sometimes - but just in the graphics - sound is still OK.
If I re-open the mixer it usually gets fixed.
Cubase_gfx_bug1.jpg

Speaking of the devil, I kept working for a couple of minutes. Here is a screenshot of bug nr 2…
If I close the mixer and open it again (F3) - the mixer channels are back to where I put them.
Cubase_gfx_bug2.jpg