Ring cannot reconnect after WiFi reboot

I have the 2020 issue of the standard doorbell 2. My WiFi router automatically reboots at 4am each night as part of its health routine. Most nights the doorbell has no issue reconnecting. But 3 times now in a month it won't reconnect. I need to reset the wi-fi router even though connection is fine with all my other devices. I won't be able to reset the router when I'm abroad though. So it's not ideal situation. Connection strength is very high so that's not the issue. I read in other posts that the wi-fi password cannot use special characters like !. Is that the case? Or perhaps it's the channel selection is the issue? Either way there is a limitation here with the device.. Can you advise what I should do? No special characters in WiFi password? And no multi channel connecting on 2.4ghz? Please advise as this is very frustrating.