Avast Mobile Webshield Turning off

Hi, every time a scan is performed, a risk is found with the webshield being disabled. And everytime I follow the instructions to go to settings, accessibility, and to enable the webshield protection for Avast antivirus. But after a few minutes the webshield access disables itself automatically. I already tried to uninstall and reinstall the app and I checked that Avast has all the permissions and is allowed to overwrite over apps. It still doesn’t work. Every week when the automatic scan is programmed, the same issue reappears, I don’t know what else to