Are you experiencing any similar lagging or performance problems with other apps on your S20? If yes that does indicate there could be a problem with your phone, in this case look into Samsung Experience. The launcher would be a likely source for general user interface glitches.
If no, and the problem is just happening with the Chrome app, at least there's just the one app to look into. Have you tried Force stopping the app and Clearing its cache? If that doesn't help, a more drastic measure is to use the app's Clear data option. This wipes the app's configuration and settings files so it's not something to use unless necessary. Clear data will return the Chrome app back to its original, first-time used state
Do you have your Chrome app set up to sync with your desktop/laptop Chrome browser? Also, do you have a lot of extensions installed in your Chrome app?