Can't set custom url in Pop Up in ArcGIS Online

MichalJurewicz

I find a bug, which makes makes using url scheme impossible in ArcGIS Online and Collector. When I try add link with some url scheme like fmp:// to popup, it works only until I save and refresh the map. After saving and refreshing (or opening in Collector) it stops working because ArcGIS Online automatically change url scheme to "#".

It makes communication Collector or ArcGIS Online with different apps impossible, because there is no possibility to define valid link.

Please see the screencast: Dropbox - ArcGIS Online custom url bug.mov 

1. Is there other way to define custom link in popup? 

2. Esri please fix it.

AdamGoodfellow_CoH

Has there been any solutions to this? I'm also experiencing the same behavior. I have also tested this in Portal 10.6 and it's doing the same thing.

Is there a workaround for this?