Sometimes I can't write a note inside

Things I have tried

Sometimes I can not write in an Obsidian note, if I type the words do not appear. To be able to write, I have to create a new note and then I can write in the other notes again.

What I’m trying to do

I tried to exit and re-enter the program but to no avail. I tried to create a new note and afterwards the program continues to run normally in all other notes.