You don't say which camera, but it sounds link Highlight Warning is flashing showing overexposure areas.
Check your manual to see if you can turn off Highlight Warning.
If not, adjust your exposure to eliminate the blinkies.
For some scenes you can't avoid them.
So that the Community can help you better, we will need to know what model camera you are using.
Any other details you'd like to give will only help the Community better understand your issue!
If this is an urgent support need, please CLICK HERE to reach our friendly Technical Support Team by phone or email.
07/31/2023: New firmware updates are available.
05/31/2023: New firmware updates are available.
05/18/2023: New firmware updates are available.
04/20/2023: New firmware version 1.4.1 is available for EOS R3
03/30/2023: New firmware updates are available.
2/07/2023: New product announcements!EOS R8 EOS R50RF-S55-210mm F5-7.1 IS STMRF24-50mm F4.5-6.3 IS STMRF15-30mm F4.5-6.3 IS STM