Can you give a little more detail? Are you using the Rich Text Editor or Advanced Editor?
You can also share your checklist by using the Create Share Link action from the menu on the checklist card. You can email it to support@miralouaero.com.
Ran your same checklist on latest Android 10 in simulator and still no issue. Not sure what can do to try to reproduce. Curious do you only see issue when bold text? If you put double underline do you see same issue? __lorem ipsum dolor__
If you put single * or _ around each word to italicize does same thing happen?