Hello! I have hAP lite. After updating to version 7 a month and a half ago, it began to behave strangely: if no one in the room uses the Internet for a week or so, it hangs, the network name shows, but it's impossible to connect neither by network name nor by 192.168.88.1, even by LAN cable from a PC, it only helped to remove the power and turn it on again. It happened two or three times. For a while now it doesn't seem to happen again. Please advise what could the matter be.

hAP Lite and ROS 7 might run out of memory.

Do a clean netinstall of ROS v7.6, then simply re-configure using the exported file from the terminal (not the backup feature). You'll be fine then.