[Mac] After crashing very disturbing blinking flashing during initial loading of game client

1. Title: very high frequent flashing pattern (between black and white)
   NOTE: this very disturbing and for the first time in my life I understand these epilepsy warnings when looking into this high frequent flashing
2. Reproduction Rate: depended from video setting
3. Blocker? yes
4. Details:
   Because of the frequent crashes I try to avoid the problem by changing the graphical settings. The high frequent blinking was due a config change BEFORE 15:44 (CEST)
5. Steps to Reproduce: play game with mac client, wait for crash (just leave some scenes) and start game again, during inital loading (after you clicked play in the bottom) this blinking occurs during initializing the game client
   Workaround:
   if you play in windowed mode, will not see the flickering when the game client is crashed.
   (however, this does not decrease the rate of crashing (still 3-5 times per hour), it just makes it more convenient to restart the client).
6. User Specs:
   iMac (Retina 5K, 27-inch, 2017)
   3,8 GHz Intel Core i5
   40 GB 2400 MHz DDR4
   Radeon Pro 580 8192 MB