Anroid Tablets Getting Hot and Shutting Down

I am using Lenovo Tab 4, 8" Android Tablet, Quad-Core Processor, 1.4GHz, 16GB Storage, Slate Black, ZA2B0009US. I am running Ver 19.06 of the interviewer app with maps on Andriod 7.1.1 (unfortunately these tablets due to their regional setting will not update to Andriod 8.1.0). The tablet is running hot and constantly the interviewer app is shutting down unexpectedly. Is there something wrong with this version of the interviewer app on this version of Andrio 7.1.1. I do not have this problem with Andriod 8.1.0. I don’t understand why the operating system of Andriod 7.1.1 is not adequate to run the interviewer app properly. Can you explain what is happening?

Overheating may cause the device to behave erratically or shut down.

A manufacturer-specific forum may be more enlightening on the overheating issues.