Guest/Public can't reshare anymore after upgrade to NC25

Nextcloud version 25.0.3
Operating system and version Ubuntu Linux 18.04.6
Apache or nginx version Apache 2.4.29
PHP version 7.4

The issue you are facing:

Is this the first time you’ve seen this error? Y

Steps to replicate it:

  1. Create a public share link with modification auth
  2. Go to this shared URL
  3. Try to share a file or a folder
  4. You can’t :-/

Can’t say if it’s a bug or a new settings for NC25. Thanks for your help.

not : I’m not using and talking about the guest app here

When was the last time this option was working, NC 24?

Do you find any errors in the logs (that creating the share failed etc.?)?

The last time was for sure NC23. (We quickly upgrade NC 24 and then NC25 so I Can’t be sure)
What log precisely I have to check ?
The share created is usable (ppl can connect with pwd etc) but the guest/public don’t have any “Details” pannel.