Background start not allowed when Optimizing battery use

[532910]

With Battery optimization set to Optimizing battery use:

I EventStreamServiceX: sendAction im.vector.services.EventStreamServiceX.PUSH_RECEIVED
D GmsGcmRegisterSvc: onBind: Intent { act=com.google.android.c2dm.intent.REGISTER pkg=com.google.android.gms }
W ActivityManager: Background start not allowed: service Intent { act=im.vector.services.EventStreamServiceX.PUSH_RECEIVED cmp=im.vector.app/im.vector.services.EventStreamServiceX } to im.vector.app/im.vector.services.EventStreamServiceX from pid=5624 uid=10095 pkg=im.vector.app startFg?=false
I EventStreamServiceX: ## Failed to start event stream
I EventStreamServiceX: java.lang.IllegalStateException: Not allowed to start service Intent { act=im.vector.services.EventStreamServiceX.PUSH_RECEIVED cmp=im.vector.app/im.vector.services.EventStreamServiceX }: app is in background uid UidRecord{...}

microG Setting shows incoming push is received, but unable to start riot.im app

With Battery optimization set to Not optimized all works fine.

RiotX (and SoundCloud) works fine on the same setup (Lineageos+microG) without setting Battery optimization to Not optimized.

LineageOS+microG 16.0, OP3T & ZUK Z2 Plus
Riot.im is from google play.

[532910]

Looks like it's not a riot issue.

[532910]

I've do more tests, an this is definitely a riot.im issue.

[Gigadoc2]

Could you elaborate what you did and why you are now confident that this is a riot.im issue?

[532910]

As RiotX works fine on the same setup.