Empty input() or input("") won't ask a thing and duplicate the output

[WebReflection]

I am basically forwarding this (wrongly opened) Xterm.js issue: xtermjs/xterm.js#4966

Apparently when no argument/parameter is passed to input(), or input("") with empty string, expectations are broken and the terminal prints last printed thing twice.

Is this a known issue and/or can we fix it by passing a zero-width char out of the box, when no argument is provided, which solves all the things?

That is: input("​") (note: you don't see it, that's its purpose, your IDE would though, or should!)

input("​")

GitHub copy would definitively give you that invisible char!

Thank you!