My browser / operating system: ChromeOS 14092.77.0, Chrome 93.0.4577.107, No Flash version detected
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so i was changing my profile picture..
when i refreshed the page it changed to the default and i cant change it back.

help is appreciated!

I can see the picture when I go to your profile, but not on this discussion post. I think the website just needs some time to update your profile picture.

now its only showing in this discussion page

Please read this topic: https://scratch.mit.edu/discuss/topic/543915/