When writing some code (in SA code editor) like

if () {
I often create an error in code editor, because in order to have char { (on AZERTY keyboard), I must use AltGr + {

Code editor cursor then comes to the beginning of the current line and shows the Error icon.

I don't know if editor should forbid this char or not, but that gives some kind of invisible error.

Trying to delete this phantom char deletes unexpected lines/chars (I really did not dig deeper...)