Why is my module locking up and crashing?

First check you are running the latest available for the module (if firmware based). Upgrading to the latest firmware may well fix the issue. 

Attempt a factory reset if supported by the module (check the manual - usually power on with the encoder held).

If neither of the above help contact help@busycircuit.com with details of the issue and your setup - including a short video clearly demonstrating the issue can really help diagnose quickly!