[Leo.G (Leo)]

I may be wrong but I asked my son who is familiar with a lot of server equipment and software (not astronomy sadly) and he programs.
He mentioned it's possible the red overlay is basically another box over the entire screen which may not allow pass through for keyboard control.
As for a work around for such a system I would imagine it would be something the company making the software should make allowances for.
I'm not stating this is your issue but my son mentioned it is something which happens in some circumstances. He suggested seeing if you have an extra dark mode and trying that instead of the programs night mode.