redirection after login (multisite)

What other differences are there on the subdomain install? Unless these are both fresh installs with no plugins, we need more to go on.

Ya, My subdomain is a fresh installation and my sub directory is the old one with few plugins. But I haven’t installed any plugin for that redirection.
is there any plugin to fix this problem?

No, there would not be a plugin to fix something like that.

I haven;t heard of the issue either. I;ve just set up a new subdomain install so I’ll test & see if I get the same result.

On your subdomain one – do those users have sites in that network?

UPDATE:
@andrea_r
I fixed first two problems. But what about the 3rd one? “Ipstenu” told me that it’s a WP BUG. But why it’s working for my sub dir installation then? is there any way to fix this problem?

REF URL: https://www.ads-software.com/support/topic/wp-loginphp-session-issue?replies=5