Hello @v-monli-msft. It is very challenging to track down my users as they are geographically dispersed (different timezones). Their version of IE is dictated by our org based on the OS (Win 7, 8.1, 10) and I cannot control it.
I'll try to track down this user and get the requested info.
In the meantime, I'll put out a communication to "just use Chrome". This is a strange request (from my point-of-view) as you'd expect PowerApps to be reverse-compatible with all Microsoft browsers (or at least more so than with a competitors browser).