RBK50 needs reboot often

At times we have devices connected to WiFi but can’t connect to the internet. They are various, IOS, windows 10 devices. The cable modem is good but normal wifi returns after rebooting the RBR50. It happens at least once per week. Seems like most of the times it 2.4GHz devices having problems.

Router Firmware Version
V2.7.2.104