Entering a portal gets you stuck on "Building Terrian".
Please if you have the same problem vote and comment whats your device and how this started to you.

Affected Verions : Android 7 & Android 9 and under, RAM : 1GB and under + 2GB RAM

Devices :
Lenovo Tablet TB-7304I, Huawei Mediapad T3, Huawei Mediapad T1, Huawei Y9 2019, Huawei Mate 9, Lenovo Tab 2 A7-20F,
Lenovo Tab 7, Lenovo Tab 7 Essential, and other..