Edge and chrome got freezed

Hi I’m running a script at multi browser up to 20 at same time from command line with Python Language.
My problem is not all browser works on same time for example browser work and browser no …
Browsers not working got freezed until I select them and then they start working as well .

So please anyone can help me to run my script properly without any action for me

hi, do you have a macro to recreate the issue?