"Connection Failed" in Finder when trying to connect QNAP NAS
I recently upgraded to a new 2018 Mac Mini running OS Catalina 10.15.3 and now almost every time I open Finder and click on the name of my QNAP TS-251 NAS I get a Connection Failed indication. Once I get that message I then click on Connect As in Finder, the login window pops up with my auto filled NAS user name and password filled in, I select Connect and I'm in. I never had this problem with the 2011 Mac Mini. I've tried deleting the password in Keychain Access and re-entering it and ticking the Remember Me box on the login window, etc. but the problem persists. Sometimes it connects without issue but it usually gives me the Connection Failed message.
Any thoughts would be appreciated. Thank you.
Mac mini, macOS 10.15