Geizhals: crash during app use

Hello,
I hope this isn't a copy of an already existing issue. If so, please close/delete :)
• Android 8.1
• microgG 0.2.6.13280
• The app is mostly working fine but crashing, when selecting offer details.

Logcat:

<<< log_count = 8 >>>
[10-16 20:35:52.142 6892:6892 D/GeizhalsApiService]
onGenericDataLoad: GenericLoadDataEvent{mDataEnum=GET_PRODUCT, mRequestData=at.geizhals.pv.model.rest.request.product.ProductRequest@32ecb0}

[10-16 20:35:52.354 6892:6892 I/chatty]
uid=10161(at.geizhals.pv) identical 3 lines

[10-16 20:35:52.427 6892:6892 E/AndroidRuntime]
FATAL EXCEPTION: main
Process: at.geizhals.pv, PID: 6892
java.lang.SecurityException: Neither android.permission.ACCESS_COARSE_LOCATION nor android.permission.ACCESS_FINE_LOCATION granted.
	at org.microg.gms.maps.GoogleMapImpl.setMyLocationEnabled(GoogleMapImpl.java:443)
	at com.google.android.gms.maps.internal.IGoogleMapDelegate$Stub.onTransact(IGoogleMapDelegate.java:285)
	at org.microg.gms.maps.GoogleMapImpl.onTransact(GoogleMapImpl.java:617)
	at android.os.Binder.transact(Binder.java:627)
	at com.google.android.gms.maps.internal.IGoogleMapDelegate$zza$zza.setMyLocationEnabled(Unknown Source:25)
	at com.google.android.gms.maps.GoogleMap.setMyLocationEnabled(Unknown Source:2)
	at at.geizhals.pv.content.merchant.MerchantOverviewFragment$5.onMapReady(MerchantOverviewFragment.java:758)
	at com.google.android.gms.maps.MapView$zza$1.zza(Unknown Source:7)
	at com.google.android.gms.maps.internal.zzm$zza.onTransact(Unknown Source:28)
	at android.os.Binder.transact(Binder.java:627)
	at com.google.android.gms.maps.internal.IOnMapReadyCallback$Stub$Proxy.onMapReady(IOnMapReadyCallback.java:79)
	at org.microg.gms.maps.MapViewImpl$1.run(MapViewImpl.java:117)
	at android.os.Handler.handleCallback(Handler.java:790)
	at android.os.Handler.dispatchMessage(Handler.java:99)
	at android.os.Looper.loop(Looper.java:164)
	at android.app.ActivityThread.main(ActivityThread.java:6494)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)

[10-16 20:35:52.577 1035:1046 W/ActivityManager]
  Force finishing activity at.geizhals.pv/.MainActivity

[10-16 20:35:52.644 1035:1067 I/ActivityManager]
Showing crash dialog for package at.geizhals.pv u0

[10-16 20:35:53.097 1035:1066 W/ActivityManager]
Activity pause timeout for ActivityRecord{160a696 u0 at.geizhals.pv/.MainActivity t1158 f}

[10-16 20:35:55.155 1035:1046 W/ActivityManager]
  Force finishing activity at.geizhals.pv/.MainActivity

[10-16 20:35:55.274 1035:1046 I/ActivityManager]
Killing 6892:at.geizhals.pv/u0a161 (adj 902): crash

EDIT: It's working, when manually granting the location permission in system settings for this app.
But shouldn't there be a permission request dialogue for this?
(I'm pretty sure I could use this app without location permission before when using Play Services)

Start with the crash path in org.microg.gms.maps.GoogleMapImpl.setMyLocationEnabled and the app-side call at MerchantOverviewFragment.java:758. Reproduce the offer-details flow on Android 8.1 without location permission and inspect how permission state is handled. Done means the flow no longer crashes and the expected permission behavior is verified.