Unable to download maps in Collector for ArcGIS Online

[NicoSpliethof]

Users in my organisation cannot download any maps today (maps which were previously able to do so). The problem suddenly occured this morning and the error we are receiving are all pointing to "Connection timed out". The maps are available online.

Anyone else having this trouble? Are servers perhaps offline (even though they are online according to ArcGIS Online Health Dashboard ?)

[BrianWebb3]

We have the same problem but oddly can download a map for offline use when on certain ISPs.

We receive errors when failing to download:

• Invalid URL
• Your connection reset by peer
• Error invoking service, connection reset

We have successfully tested and downloaded maps while using wifi/LTE on the following ISPs: AT&T wifi, WOW, Sprint LTE

Failed using: Spectrum Time Warner and T-Mobile LTE

I have a ticket open with ESRI. We are using Portal for ArcGIS with tiled aerial imagery from AGO.