Some 5 GHz Wi-Fi channels share spectrum under rules that require radar detection and channel changes. Compatible equipment may move channels when required. A brief disconnect can therefore have a radio-management cause rather than an account problem.
Check the router event history
If the model exposes relevant events, compare their timestamps with the interruption. Do not infer a radar event from every pause. Other causes, including a reboot or weak backhaul, can look similar to the viewer.
Follow regional rules
Available channels depend on location and equipment. Do not change the regulatory region to unlock channels intended for another country. Use only the device's supported configuration and the vendor's guidance.
Test a supported alternative
If recurring channel events affect a stationary player, consult the router documentation about suitable channel choices. Keep the comparison narrow and assess other devices too. The goal is a stable lawful setup, not the widest list of selectable channels.