Tie the restart to the power event
Note whether the Roku startup screen appears only after the television has been off, or whether the player also restarts during an active programme. Trace the power cable separately from the HDMI picture connection. They perform different jobs even when both disappear behind the same screen.
Roku documents that many TV USB ports stop supplying power in standby. Its startup guidance also says cached channels are cleared when the player powers down. A longer first application launch after TV power-off therefore belongs in the same observation rather than automatically proving an application update failed.
Compare a suitable continuous supply
For an existing USB-powered player, Roku suggests its cable and suitable USB power adapter connected to a wall outlet. Use the device’s supplied or correctly specified power equipment. The comparison is whether the player stays powered when the television changes state, not whether a different streaming account behaves better.
Keep the television input unchanged during the comparison and wait for the actual player home screen. Record whether it now returns without a full boot. If the behaviour changes only with the power source, that is more specific evidence than a general statement that the television or internet connection is slow.
Recognise a different active-session fault
Roku separately describes insufficient-power messages and a flashing red light as low-power indications. A solid red light has a different overheating meaning in its guidance. Note the actual light pattern or message instead of using every red indication as the same diagnosis.
If restarts continue while the television is on and suitable wall power is connected, retain that distinction in the report. Include the Roku model, power source, cable, exact timing and warning state. A standby-related cold boot and a crash during active playback need different evidence, even when the viewer first describes both as the Roku restarting.