This is common to me, I will just see an user that I did not ignore but ignored. I do not know why this is like that. Not frequent but I do see it very well.
Is any other user noticing this?
This is because no message to check a box or something like that after pressing on ignore which can be a mistake. Is there a place that I can go to to set this on my profile? I mean confirmation before ignoring an user.
Did you use your account on mobile regularly? It's more possible to mistakenly Ignore a user if you are on mobile than on laptop or computer.
The confirmation message for Ignore a user is not too necessary. It is very simple to click on UnIgnore and it is done. Because you know about users you don't want to Ignore, you can UnIgnore them manually and easily.
I have experienced it before. But most times it happens to me when I’m accessing the forum through mobile phone since you can just click on some url you never intended to click on.
You can not Ignore a user by clicking on URL links. You only can do it with your Ignore list by adding that username into your Ignore list or by clicking on Ignore. The former is no way to be done by mistake and you don't know about it. The latter can come from mistake when you are on mobile. If you want to click on the username to go to its profile and mistouch on Ignore.
The only option I could see in settings is a place to check out all the names included on your ignore list.
Ignore list will be edited manually with the Ignore Settings
This page allows you to choose which users' post to be hidden from you.
Ignorelist:
Add one Username on each line.
It will never be edited by mistake like with one touch.