No Profile Picture Sync on mobile Devices

Hi,
today i tried to use profile pictures. it dont work.

On Desktop it work, on mobile Devices in Wlan and external the Pictures dont visible.

Desktop
Chat

Mobile

Rocket.Chat

Version 1.2.1
Version der Anwendungsumgebung 1.4.2

Version 4.9.0-11-amd64
Node-Version v8.11.4
Mongo Version 3.6.13
Mongo Storage Engine mmapv1

Upload Settings in GridFS no Limit.

Android Version: 4.0.2.2087

I hope you can help me.