Hi Nomte,
When I try this in 4.13, since I no longer have 4.12 installed, everything is working correctly for these nodes. The only issue I had was having to use a lower offset value. With a negative 50000 you’re likely seeing a limitation of mobile here. Try smaller values, as that worked for me. If it’s still a problem in 4.12 try 4.13 and see.
I used your same setup with an offset amount of -500 and also trying an offset value of 500. Also, depending on the device you’re deploying to, it could also be a limitation there, as I’m using a Nexus5 phone running Android 6.0.1.
-Tim