my phone(pro 5 64+4) has presented two times freezes, the first time watching a video from the internal memory (hang up with the power button resumed after 1-2 minutes)
the second when I put it to download something and mobile stuck without giving display the screen for the next two hours you have suffered no other need to worry;
the phone is the stock rom.
Does the video resume even without display (you can here background music), or your device completely crashes? Does the download finish or carry on without display? Which firmware you using?