Hi I am sorry but I am glad we have the same issue to talk about this issue..
I have updated my MacBook Pro 2019 yesterday and just found my screen is blinking every few minutes.
I assume that this problem is due to extended monitor.
Also, when I moved my ZOOM (webinar application) window, the second monitor screen is partially broken..
I do hope this issue is fixed ASAP..
JinWon_Kim
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