Better check this topic with more helpful tips. 
Please create new topics, the old ones refer to older app versions and things change continuously.
And can describe in detail what does not seem to work as expected.
Also copy here the “Settings | About | Info” for all tested devices.
Cannot see location marker on map when have GPS enabled, did it work before?
Or lose its signal when app is in background?
If GPS signal is lost when app is in background, better check the documentation for tips.
Some OEMs use battery optimization techniques, without respecting Android guidelines and stop background apps: