A minor update to the Survey123 field app in the Google Play and Amazon stores has just been made available. This new build, addresses BUG-000117493, which affected Android 7.0 (and newer) devices when attempting to connect to an ArcGIS Enterprise portal using non-CA-signed certificates.
BUG-000117493 "SSL Handshake failed (6)" error is generated in Survey123 app when attempting to connect from Android 7.0 or higher to an ArcGIS Enterprise portal using non-CA-signed certificate.
The new build number for the Survey123 field app on Android is 3.1.159.