Preview flickering problem

Hello, I fixed the problem by lowering the Hz on my screen. I wonder why high hz should make a problem, but I lowered mine from 165 hz to 119 hz. 

You can access it through screen settings --> advanced and go down to "update settings". My settings are in danish, so I do not know if I used the right translations. But something similar to what I wrote at least.

Working on a Mac 10.13.6 High Sierra. The Mac is old, but it works fine cos I replaced the 2011 harddrive with solid state. A flicker appeared in the Premiere timeline/previews and renders late in the editing process, in a clip where I trimmed audio unlinked from video. The flicker was like a drop-out followed by a repeated frame... a very distracting 'flash'. I didn't export it. After reading this thread I tried something simple and it worked for me. I just saved the project and restarted the computer, restarting Premiere alone with no other programs to compete for memory. The flicker was gone, and it hasn't come back.

I just resolve the issue with some help of another Adobe suppor community (sory for bas english)

Go to Edit>Preferences>Media and uncheck Enable accelerated Intel h.264

then delete media cache

Maybe its get a little slower... but no glitch

Go to the menu Sequence / Sequence Settings... and try changing the Preview File Format to another one you already have active. Try QuickTime first.

When asked if you want to delete all Previews click on OK.

This can happen if you have imported the clips and started to use them before Premiere Pro has Conformed them. Deleting the Media Cache and Media Cache Database and then open the project and waiting until the Conforming process is done solves this 49 out of 50 times.

How to: FAQ: How to clean (delete or trash) media cache files?

Might want to fix the audio first.

Do not count on Windows to be fully up to date when it comes to device drivers

Go to the vendor site to be sure you have an updated driver for your graphic adapter

•nVidia Driver Downloads http://www.nvidia.com/Download/index.aspx?lang=en-us

There are also intermittent reports that the newest driver is not always the best driver due to driver bugs or compatibility issues, so you MAY need to try an earlier driver version

and I am using Premiere pro 2019 V13.0.3