Nextcloud 26 fails with multiple LDAP sources

I have upgraded Nextcloud to

I have configured two LDAP sources to two different directories.
Each of the LDAP sources show “green”, I can check groups, users sucessfully.

No user can log in, and I cannot list users under Users. LDAP failed.

If I remove one of the two sources, the users can authenticate.

There was a bug in 25.x versions, which has been fixed, but it seems there is another one in 26.x.

Is there any fix or workaround for 26.x version?

Thank You very much!

They asked to create a new bug report for NC26. So we can’t do a lot here…

same problem. is there a fix or workaround (beside reducing to 1 ldap)