I just started having this issue after the last update as well. Searched and found few people on google with the same issue. How To fix this issue? The solution is very simple.
Do you have your desktop background set to change over time? Windows will automatically pick an accent color to match your desktop pictures. This causes the tabs Flickering/Flashing/Blinking issue.
Easy fix, go to settings -> personalization -> colors, and uncheck the box that says “automatically pick an accent color” This fix worked for me. You can test it by chrome open with few tabs and right-click on the desktop and select “Next Desktop Background” and see if chrome flickers. If the “automatically pick an accent color” is unchecked it stopped flickering. I hope this solution works for you. If you have any questions or have any other solution please share them on the comments below. Have a nice day.