Deleted setting keeps comming back

so here’s the thing : our office unable to access any http sites from our router internet, turns out it’s because a rule in web proxy access.
so the first thing i do is to delete the web proxy access rule,after that we able to access the http sites again but the web proxy access rule will comes back a few minutes later and mess it up again.
so i tried to disable the web proxy completely and delete a rule in firewall > NAT, and the same thing happens again (able to access all http sites until the rule comes back)

why is this happen ? why the deleted rule keeps comming back ? please help, im absolutely clueless about what to do with this issue

also please pardon my potato english

Your router is probably compromised. Please update, change passwords and check configuration.

https://blog.mikrotik.com/security/winbox-vulnerability.html