After I've saved a post to a /c hosted by another instance than the one that I'm logged into, I can open that post for editing, but I'm unable to save my edits to that post.
For example: I made a post to !ukraine@sopuli.xyz, while logged in elsewhere. Something or other in the webpage link is forcing a download, so I tried to edit the URL in the post, but I can't save it.
This also happened to a post I made to !coffee@lemmy.world where I was trying to edit the text in the post's Body after saving the post.
I can save edits to my posts to /c's on my native instance just fine.
Someone just gave me a workaround for this:
Before saving the edits, select a language, other than "Undetermined".
After doing that, my edits to the posts saved normally
This is strange because neither of the communities you mentioned has any language restrictions. Can you say what error is being returned exactly? You might have to use browser dev tools to see the details.
It looks like some kind of fix was implemented after my post, so I can't replicate the problem for you.
Whenever I edit one of my cross-instance posts, the language defaults to English, and I can save my edits with no issues.
Now whether the fix was on an instance basis, i.e. config changes, or in some Lemmy-system update, I can't tell you.
edit: Maybe my issue was solved along with the fix for the default languages: https://lemmy.ml/post/13410320
We didnt make any changes to the Lemmy version running on this instance during the past week. So it must be something else...