With modular.miraheze.org (and no problem with non-miraheze MW wikis). On different computers on different networks, with Google Chrome. I 'm doing copy-editing, mostly in multiple open tabs. It keeps logging me me out.
This has been happening, but it can't currently be reproduced. Please try selecting "Keep me logged in". If this issue still happens try changing browser, if it still does please reopen the issue.
I logged in via IE 11 into modular, then I tried logging into scruffy2. I got "Incorrect password entered. Please try again." and the other tabs where I was logged into modular are logged out. I can login to them again but not scruffy2. I do select "Keep me logged in".
This is the 2nd wiki called modular, the first was renamed to scruffy2.