Delete the Media Cache and Media Cache files:
If that doesn't work,try resetting the preferences:
If that doesn't work, try resetting the Workspaces:
Reset a workspace
Reset the current workspace to return to its original, saved layout of panels.
1. Do one of the following:
• Click the Workspace menu icon and select Reset to Saved Layout.
• Choose Window > Workspace > Reset to Saved Layout.
If that doesn’t work, try updating or rolling back your graphics driver directly from the video card manufacturer’s site.
Please use the free MediaInfo and post a screenshot the properties of your media in tree view:
If the file is variable frame rate, which although Adobe says it will support, many users are having issues with VFR.
Use Hand brake to convert to constant frame rate:
Here is a tutorial:
Sorry about this poor experience. We have a new version of Premiere Pro (v14.3) available for download. Please update Premiere Pro to the latest build and check if it's working properly. If you are still experiencing the issue, try these steps and check if it's helping.
Let us know if it helps.
I too am experiencing this same issue did any of these solutions help ?