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Hi everyone, I am a bit new to WordPress since it has just recently been added to my team’s list of responsibilities. We have a Dev site that we use for testing things, but for a while supposedly, our users have been getting locked out every so often. I have attached a linked photo and I am hoping that it is working, but we are getting a page that says “Your access to this site has been temporarily limited by the site owner.” Then below that it says “Your access to this service has been limited. Please try again in a few minutes. (HTTPS response code 503)”. Lower down from that it says: “Block Technical Data. Block Reason: You have been temporarily locked out of the system. This means you are not able to login for a while.” Again, I am hoping that my image below is loading properly, but I cannot tell while I am writing this.

Now this error is happening regardless of if those affected have 2FA enabled or disabled. I can go to the Blocked section in the admin panel and see no one is being blocked, yet a few of my users are getting this error anyway. At the same time as they are getting that error, I am able to login fine. I am generally unaffected by this issue, but there was one time that two people were getting this error, and then I tried to login for the first time and immediately got the error as well. Usually we have to wait a few hours for it to go away, but it will happen again maybe a day or two later. We tried to check any logs that we can for indications for the issue, but found nothing.
It is consistent a problem enough that we are considering moving to a new security plugin, but we would prefer to see if we can track down what may be happening here first.