[2019] Can someone explain what rule was broken here?

Hey guys,

I have flagged this to the support team and it looks like a filter thing got overzealous.

We have shot that filter. This should not happen again and we've shown all the other filters what will happen should they try this again. We expect them to behave.

If you submit an appeal the ban should get overturned.

We apologise for the inconvenience.

= Raven =

Edit: Quick edit for clarity of what will get overturned in an appeal.