ET1 Screen suddenly block

Hello all,


We developed an android application and we have some problems with it on Motorola ET1.

We use these application in several warehouses, but in particular one we have major problems with the tablet.

After you logged in the application after several minutes the screen of the tablet its frozen and all the buttons from the tablet with it.

I can't do anything to unfroze the display only if i remove the battery or force restart

Can anyone tell me if you saw and had issues like these, or if knows how to resolve these ?

My guess is that, when  the tablet enter in sleep mode something is blocking the OS an its crushed.

Could be related to the wireless connection to ? because i also remarked that the wireless connection is not the best in these warehouse and also these issues appear only when i ' m connected to the wireless


Please help me


Thank you