Hi,
Sorry to hear about your issues š
We have not had similar reports so Iām not sure what could cause it.
What is odd is that you say āsubscribers complain about having to change their loginā ā¦ do you mean they are changing their password? I donāt see how that would be connected to Login Lockdown. If they get locked down that is based on IP. Login Lockdown doesnāt do anything related to user passwords.
Cache of any kind can cause odd issues that are hard to figure out. And cache could cause issues with Login Lockdown as well (like cache the login page in the ālocked outā state and display that to users that should have access.
As for the invalid username error, Iām not sure why that would come up for a valid user though. Maybe someone attempted to inject some code in the username and it got stripped off by the escaping functions before being logged to the database leaving just the username.