Bug? number list formated inconsistently

What I tried: copying over numbered list from other sources

What am I’m trying to do: let them be displayed in view mode consistently, whether recognized as numbered list or plain text

but it somehow shows up some as numbered list (with an indent), some as plain text, see image below:

reading mode:

live preview mode:

source mode:

I’m in the default theme with all css snippets turned off, but I do have some community plugins, could one of them be doing this?