Description of the problem or steps to reproduce

Micro seems to replace some special or invisible characters with spaces

Specifications

In Persian and other languages ​​we have many invisible characters, for example:
u+200c
u+200d
u+200e
u+200f

But when we use this character in the micro editor, a space is displayed instead.
Everything is fine in the output file and there is no problem. But displaying text in the editor is confusing
You can try the following examples.
4 characters: slam
12 characters: sl‌‌‌‌‌‌‌‌am
slam in Persian is the same as hello

I expect both of these expressions to be the same but displayed in micro in "sl               am" form.
thank you

Commit hash: 6bc498e
OS: ubuntu 20.04
Terminal: gnome-terminal
micro 2.0.9