Your comments

Would it be an option to add a warning message, which shows up if the user wants to close a note with pending changes in it?

A smart but very effective usability improvement! I support that idea.

Closed due to inability to collect 10 votes for more than 2 years.
Closed due to inability to collect 10 votes for more than 2 years.
Closed due to inability to collect 10 votes for more than 2 years.
Closed due to inability to collect 10 votes for more than 2 years.
Closed due to inability to collect 10 votes for more than 2 years.
Closed due to inability to collect 10 votes for more than 2 years.
Closed due to inability to collect 10 votes for more than 2 years.
Closed due to inability to collect 10 votes for more than 2 years.