If you not watching any TV on a ROKU or your being idle in whatever app your on. Then, your ROKU starts freeze and then it reboots/restarts when it's froze more like crashing. And, I have experienced that a lot of times and I don't know how to fix it. Is there like any way to resolve this issue?
You need to be more specific. What model Roku are you using? If it is a Stick, it is connected directly to the TV or do you have an HDMI extension cable? Is the Roku being powered by a USB port on the TV, or are you using the power cube it came with? There are many variables that can offer some clues to the problem.
Dan Roku Stick (3600), Ultra (4640), Ultra (4670), Ultra (4800), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Nvidia Shield, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.