Lost connection to server on Android client with Android 7.x

Description

We use rocket chat with 60 android 7.x tablets. Sometimes the tablets looses the connection to the server and the connection information have to configures again in the app
We don’t have this on devices with android version 8.0
Have had anyone else this problem and a solution for it?

Server Setup Information

  • Version of Rocket.Chat Server: 2,1,1
  • Operating System: Ubuntu 18.4 LTS

Any additional Information

Wie see in the log this:

I20200122-20:45:11.737(1) removing push token fvSPpPQShGQ:APA91bGdXoekpKxmLAoxHkc-UPK2bONOFiIejB0ixhme3NmY52cfaxyg4Ak6-PIXOE2G432QYz5lTa2Xwh-NDLkdSz62Cp-PwAWufXbLnTc6Fs9BZ3FZ8KXF1_***

I20200130-12:28:29.796(1) removing push token dnBU65TkePg:APA91bEq7Eg__qfY98Z2xuK7-Zg-hv8Kb6u3obZk–laZxhzi9FIiCC3XVHdbCxgcppMW2z67No3PZiWztcyaJc9BP-ngf36YxcVUNORNjiD8nAhH7G-***

I20200130-15:54:13.148(1) removing push token fDQvts7zNqQ:APA91bEp46o8xNEAlMHUxLWMGFleCR9hfivD2MOWu1p4DYOIPJJ1vwI7Uu7Wq5tFyz6ubQkK-m1qjEmRyovhZ5dwnOWUHLaULulYijCyEZtG6jT2xa00wJwU_***

I20200131-16:42:45.076(1) removing push token fhNTa2eP644:APA91bEBy78Gi1nMB3Vlu3u-30d75SvWEpiHIy7tOCPAUhLqbA4EC3bcloWPkLpSzSnvE-NgKHNMqLYhgXp0W8x_vPnSe4R31gC3JuOjWGMs-Ds2YzgckgTEfQ_***

I20200203-08:59:00.620(1) removing push token ciKy3tRCikY:APA91bHFPd97FWcfkmJiL_u-jDKkv4oLcEqURgPrMLcj4aJn3vapmGppvWwiV9oVtL53SqHSD6rlu-J8-kfN2lW_JX0hW8NewcPlp6-ei2DC1bwsPJLj_***

I20200203-10:12:22.010(1) removing push token f302g6e4uU0:APA91bF011jRMUypwuZ1ptcLESBgznO_6cBRtX62yZIWO-Z60XDdAtF7vTCpXIt1BhdlOudZL2j94MM9n39Rs2hHH7ofHCBXJK-pakv9Z6HlbdwVZveqxHX***