@Tea2 loss of connection overnight can be down to line maintenance which is unavoidable. Resetting the hub fully means you lose the log files etc so its difficult to know why you lost the connection. If the line is down the hub should reconnect on its own the only real reason to have to reboot a Sky hub is to get it to optimise its wifi channel choice. Resets should only be necessary to try to clear a fault
If you post your hub's stats taken while connected forum members msybe able to help see Find your Sky Broadband router statistics
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65inch Sky Glass, 3 Sky Streaming Pucks, Sky Ultrafast + and Sky SR213(white Wifi Max hub) main Wifi from 3 TP-Link Deco M4 units in access point mode
