It does seem the team has decided on a mix between source mode and live preview instead of keeping them entirely separate. However, I cannot replicate the hashtags of the headings disappearing with source mode activated. Are you sure you have it activated and don’t have any custom CSS snippets or plugins that might be causing issues?
Thanks all, I’m glad i posted this question here, it was driving me insane!
Since WhiteNoise confirmed there was no change I deactivated all my plugins to find out what was causing this behaviour.
It seems to be a bug in the make.md plugin. I ditched it and everything works as expected again!
Thanks for your help.
Edit: Actually there is a new option “Mark Sans” in the plugin options. However, disabling this only took effect after a restart of Obsidian which made me think it’s a bug. I still don’t think it’s a good idea to enable such an option by default.