btw sometimes bot doesn't make this edit, sometimes it does, but incorrectly in described way.

@Dvorapa Is there a difference between CFR and CFD?

@Urbanecm CRF templates propose categories to be renamed, CFD templates propose their deletion. The command category move doesn't delete the category, just moves it (and then proposes the old version for deletion) and therefore it should remove the CFR templates from the new name and add CFD template to the old name. But sometimes it forgets to add the CFD template (please see T135304); sometimes it forgets to remove CFR template and if it doesn't, it tries to remove CFD template instead.

That behavior my bot randomly adds or removes templates looks a little bit chaotic and empty edits are not good as well.

Thanks. I looked into the code and there isn't any template in cswiki. Fascinating is in enwiki's section there are both of CFR and CRD templates. From my point of view bot don't know any difference between CFD and CFR.

There hasnt been any changes to category.py since April 2016, except for 60d0728a0a8 by @Mpaa. Could that have fixed this bug?

Maybe there should be two different variables for CFR and CFD templates (sometimes you want to rename some category but don't want to touch CFD template there)