Outlook for Mobile Deeplinks completely broken and unusable on iOS

I use Outlook as my daily email client and it seems that Outlook for iOS is unable to handle any sort of deep linking at all.

When I try to use a deeplink on iOS, I get this error all the time, the deeplink starts with appname://xxxxx

Any deeplink on Outlook for iOS results in this.

I have no clue and very confused as to why this is happening on iOS as I have checked Android and it doesn't do the same thing?