Managed to convert my website to PWA, everything works fine but a small issue with Install Banner pop-up.
The banner appear on the bottom, as it should, but disappears when user scroll page down, then comes back if he is again up the top of the page.
is there any way to fix it or is it a feature of banner?
This is the website: https://clicktoplay.ru/
It is a feature of the banner. The mini-info bar will only be shown the first time a user visits the page, and won't be shown again for about 90 days.
If you'd like to add your own custom install experience, you can do that by listening for the beforeinstallprompt event, and showing a button or other custom install promo.