The WiFi is the reason. The storagenode is a server, it must have a stable connection. otherwise it would have a low reputation (and you just prove that).
This is variation on subject Error piercestore protocol: rpc error: code = canceled desc = context canceled, your node were too slow to receive a piece and loosed the race.
Please, enable them back and configure to allow traffic to/from the node.
Please, consider to switch to a wire connection instead of WiFi. I’m not sure that powerline would be significant better, I’m more confident in twisted pair so I would recommend to use this method instead, if possible.