Google Chrome and Android's default web browser —Android Webview— have been witnessing crashes and instability on OnePlus phones for over six months now. The problem doesn't seem to be affecting everyone but is persistent across a wide range of OnePlus phones, all running Android 10. Google and OnePlus are yet to acknowledge the issue officially
https://www.notebookcheck.net/Google-Chrome-has-been-a-broken-buggy-mess-on-several-OnePlus-phones-since-late-last-year.466858.0.html
So it's not just mine I guess! OnePlus 6 running Android 10 beta channel here, I was afraid there was something wrong with my device or something! Thank you for putting my gears to rest xD
It also happens on mi A2 and the workaround I use is to press any button (obviously volume) or open notification panel or initiate home screen gesture (but not fully), just return back. It start happening after upgrading to android 10, and most common occurrence is on notebook check site.