DDJ-RZ goes into "sleep-mode" and gets totally black even when power on!

Hi

Now I have many tickets going here!! I feel worried now! The tool I use is DDJ-RZ!!
Now something new strange has happened for a couple of times now. First I just thaught it was an "one-time error" but it keeps happen!!

When I dont use the control DDJ-RZ for some hours I has a couple of times goes into some kind of "sleep- mode" that I can NOT start again from!

Example, I go eat dinner, and after I wanna make a mix I prepered before(librarys sorting for mix) then the DDJ-RZ is TOTALLY BLACK!! NOTHING is on, lights, everything is just black. The controller looks like its off!!
I have been fooled off this every time and is about to turn it on, thinking I must have forgotten that I turned it off!
BUT the power-button IS PRESSED IN, and NOTHING happens when I try push buttons or try use RBDJ, dragging song to deck. I try to "wake it" like that. But its just like "turned off"!!!

This has NOT happened before RBDJ 5! That I am sure about. So I dont know if its that OR if its the latest Firmware, because it has been a little strange about other things to after that!!

Please, what is happening with my Premium tool??? Worried customer!

Thank you in advance

Best regards