Before the update, we used to strip out all formatting and only paste plain text. That also made copying from rich sources like websites or formatted docs with links and bold text a chore, having to add markdown and fix messed up pastes.

When you copy from something like Apple Notes, it includes formatting such as links, bold, and italics so you can paste it into another editor without having to fix formatting. This messes up whatever markdown you have in there, because now you’re copying all of those (hidden, extra) things, possibly breaking markdown syntax.

since you’re copying markdown from Apple’s Notes, do this:

• notes -> share -> copy
  you’ll copy the note in plain text and avoid extra rich formatting

on Desktop, you can avoid pasting rich formatting with shift+ctrl/cmd+v

I’m sorry if this change is causing inconveniences and/or workflow changes, but reports like yours help us shape a better UX, thank you!