Inline editor creating multiple tags

Hi everyone,
I have a “Mixin-Text” type of content that I use either by itselft or on top of my Image content types.
It’s usefull for many reasons but recently I can’t fix a certain behaviour that it has.
When I’m inline editing the text and I want to go into a new line, with a button style text,
it creates multiple span tags, thus separating what I’m trying to write.
I’ve tried pressing Shift+Enter and looking in the docs and CKeditor guides, I’ve tried adding
the “autoparagraph: false” setting to my text-mixin but it’s not working, and if I understood correctly that should fix my problems.

This is the configuration of my Text-mixin, and in the picture there’s also how it prints and how I want it print for clarification.


Thanks in advance!