Expired captcha message cut off when captcha expires while tab is in the background

[Tgure]

Steps to reproduce:

1. Go to https://enngage.github.io/ngx-captcha/
2. Solve captcha
3. Go to another tab and wait 1-2 minutes till the captcha expire
4. Go back to tab to see issue

If I do the same steps on https://www.google.com/recaptcha/api2/demo then everything works fine.

[MallikarjunM1]

Same issue i checked the captcha , After 1 minute the captcha showing expire , even though i am in same page