Attaching Proxies Turns Project Panel Thumbnails Dark Green & Unreadable

Report · Sep 20, 2025

Issue – When attaching proxy video files from a mapped network drive, the video thumbnail in the project panel turns dark green and is almost completely illegible.
Steps to reproduce – 1. Store the original video file and the proxy video version on a mapped network drive, with the correct naming scheme and folder structure. 2. Import the original video file into Premiere Pro. 3. Attempt to ‘attach proxies’ and watch as the thumbnail turns dark green. This happens with all video files and is disastrous when trying to work with multiple video clips, as in my line of work.
Expected result – For the thumbnail to remain unchanged after attaching proxies.
Actual result – The thumbnails in the project panel all go dark green immediately.
Screen recording – Attached
Adobe Premiere Pro version – 25.5.0 (Build 13)
Operating system – Windows 11, 24H2, OS Build 26100.4652
GPU driver version (Windows only) – Nvidia 581.29 (September 10, 2025)
Video format – H.264 MP4
Comparative information helps us understand more about when the issue occurs:
Does it affect all projects or only some projects? All projects
Does it affect new projects? Yes
When did the problem begin? Since moving from a thunderbolt-connected RAID array to a Mapped network drive Synology NAS (network attached storage)

Report · Sep 22, 2025

Hi @benjamina17887698 - Thanks for submitting your bug report. We need a few more details to try to help with the issue.

Can you try and hold down "SHIFT" while launching Premiere and check the boxes
"Reset app preferences" (Backup Preferences first)
"Clear media cache files"

How did you create the proxy files?

Could you share the media file properties for your proxy file? The easiest way is to download MediaInfo, switch the view mode to Text, and then send us a screenshot of the report.

Sorry for the frustration.

Report · Sep 25, 2025

Hi Jamie,

Thanks for the quick reply. Launching and resetting app preferences and clearing media cache files unfortunately didn't change anything.

I've attached the file info for the proxy and the original video file. The proxy was created via the in-built proxy function on my Sony A7IV and then renamed in Bulk Rename Utility to have the _proxy suffix. This method worked fine when the files were on my regular PC drives, with no such thumbnail issues, but this dark green thumbnail problem has started since moving my workflow onto a Synology NAS.

Cheers,

Ben

Cheers,
Ben

Report · Sep 25, 2025

Hi @benjamina17887698 - Do you have sony catalyst installed on your machine?

Do you have the same issue when using the proxy feature in premiere pro?

Report · Oct 27, 2025

Hi @jamieclarke

Do you have sony catalyst installed on your machine? No, I've never had that installed and previously didn't experience this issue. My wife's PC doesn't have that either and has never had this bug (she has slightly older PC hardware).

Do you have the same issue when using the proxy feature in premiere pro? Not currently, see below.

As of 27/10/2025, I think I have narrowed the video down to a specific project that I use as a 'template' for starting new videos. For whatever reason, in that project alone I get the dark green thumbnail bug when a proxy is attached.

Using Premiere's built-in proxy generator, this does not happen - only when attaching my camera-generated proxies in this particular project.

If I do the same in a fresh project in Premiere Pro v25.5, I never get the green thumbnail glitch with either method of proxy generation, so it doesn't appear to be a file type problem or related to the way my camera generates proxies. Moreso, it looks to be some setting difference between projects that directly causes this issue/bug.

Any way for me to generate/export some sort of report/settings list on this project, so I can work out any differences between projects and what may be causing the bug? I only have very minimal settings outside of the defaults for this template, such as window placement and some audio track mixer & export settings, so it surprises me that it appears to be the root cause.

Perhaps it's something to do with the fact that this project file was updated from a previous version of Premiere Pro at some point and that has induced this bug? It did start all of a sudden.

Report · Oct 27, 2025

Hi @benjamina17887698 - Thank you for your help troubleshooting and I'm glad you found the root cause. It sounds like at some point the project may have been corrupted. At this point I would suggest creating a new template project.

What version did you create this template project in?

Are you using the Premiere built in Templates?

Report · Oct 27, 2025

Do you still have the issue if you create a new project and then import the template project into it?