My handwriting changes once ‘done’

After writing using the comment function with my apple pencil, my handwriting changes after I press 'done'.

My handwriting in red illustrates my normal handwriting before pressing 'done' at the top left corner.

My handwriting in blue illustrates what happens after pressing 'done', it becomes spiky and sometimes, it becomes unreadable.

As I am using adobe to write notes on my pdf files through the comment function (frequently, almost daily) for my studies, it is difficult to read it due to my point above.

Please help! Refer to the images I've attached for a better understanding, thank you so much and have a great day!