Exporting a freeze frame is still using proxies

This is still an issue. 
I have a workaround that I like, perhaps it could help others - I find that if I export frame (shift+E) several times repeatedly on the same frame and then go to check my export folder, some of the exported frames are from the proxy file (low quality) and some are from the source footage (high quality). You can usually see the difference in the file size of the image file. Obviously then you just delete the low quailiy versions. This works regardless of if you are exporting the frame from Program Monitor or Source Monitor, so you can keep your grading etc if you want. 
It's not perfect, but for me it's quicker than detaching and reattaching proxies. 

Still an ongoing issue. The more people that report the problem, the more priority Adobe should place on addressing said issue, one would hope. Although that theory is yet to be proven correct.

Not fixed yet, even the workaround using the source monitor will export a proxy image, the only workaround is to detach the proxy, but for someone who exports a lot of frames this method takes too long.

Thanks for all the up-votes, but I've got my work-around for this bug. What's bothering me is 23.1 won't support my long-running projects built in earlier releases. Stuck with 23 or I lose my months of work.

February 6th, 2023. Please fix this issue. It's funny looking at threads online showing that this issue has existed for five years now. It seems like it can't be THAT difficult to fix considering how complex Premiere is and how capable the programmers are clearly. 

Ha I thought it was me! yes using proxy will not untoggle in the frame grab so you get proxy quality - the workaround I use is to find the clip in project and export from source. if you pres F (match frame) the you will be on exactly the same frame; this is source so no grading etc will be on the still, but im my case I wanted to do some Ps work so just need the still.  hope this fix is comming soon 

cheers 

Switching them off at the toggle button won't do the job. The only way around it is to go into your video bin, right-click the video(s) you want to capture the frame from, and in the menu select Proxy > Detach Proxies.
Save your project before you do that, then once you've detached & exported the frame you can go File > Revert rather than re-attach your proxies.

I got the same issue even with proxies turn off.. I can't get e decent still frame from the timeline!

Good point @11623130 - I only needed the basic frame for a thumbnail.. Took me FOREVER to discover what was going on..!

Exporting from Source Monitor is a semi-decent fix, but it does not include any adjustments (even Lumetri or scaling) or additional images thrown into the timeline frame.