On a Samsung Tab S5E, in DeX mode, 1password won't start. I get this screen when launching 1password from a launcher or from a password prompt:
... which is a shame, since I find myself in DeX mode all the time as now you don't need an external monitor to use DeX. It's great for working and coding on the go.
I'm not sure what's the culprit here as DeX is able to open most non-optimized apps just fine, albeit in a small unresizable window.
This page could provide some hints: https://developer.samsung.com/samsung-dex/modify-optimizing
1Password Version: 7.1.4
Extension Version: Not Provided
OS Version: android 9
Sync Type: Not Provided