This seems like a persistent problem which has not been resolved for over 5 years - https://community.sophos.com/sophos-mobile/f/discussions/84224/web-filtering-sophos-accessibility-service-repeatedly-turned-off I have same problem on Vivo 1901…

com.vivo.assistant.apk - by manufacturer vendor is not low reputation app. please remove this bug from sophos intercept x for mobile product in the malware scanner protocol that labels "! device unsafe" and makes it the conclusion / executive summary…