Last week we had two cases with unexpected behaviours after the upgrade of following Apps:
Case 1: Collector for ArcGIS
By upgrade Collector for ArcGIS last version 17.0.3 combined to Portal for ArcGIS Enterprise, the Collector for ArcGIS need to work with a available server certificate. In combination Collector with AGOL there is no certificate problem.
2. Survey 123
To have the best working from Survey 123 with operating system Android it is necessary to install at minimal the Android version 7.X.
If there are any questions about this, you can contact our helpdesk via the following form: https://esribelgium.be/helpdesk/?lang=nl
Or call us on the number +32 (02)2 461 37 32. We are happy to help you.