App: Bitcoin Core v19.0.1 64bit
Windows 10
Internet: PureVPN with fixed IP, Port forwarding
Router: MOFI 4500-4GXeLTE V2

Relevant Parameters:
Listen=1
maxconnections=25
server=1

Problem: Incoming connection fails Global Bitcoin Nodes "Check Node" test randomly. My full-node can be up for as long as 48 hrs without failing, but, as short as 10 minutes before failing. Once it fails the Check Node, I have to shut the node down and restart it in order to pass the Check Node test again. The minimum of eight outgoing connections always seem to be there.

Any thoughts as to why this happens?

Thanks to both of you. The Electron Cash worked perfectly and the transaction showed up once I opened up my original default Electrum wallet. I thought I read that Electrum supported many crypto-currencies besides Bitcoin (like litecoin). I just did not read carefully enough!

I sent $5.00 Bitcoin Cash from Coinbase to my Electrum 3.0.3 wallet. The receive address is correct. Upon examining the transaction in Coinbase, it shows completed with 10 confirmations and the receiving address is correct (plus additional receiving addresses for the fees). When I go into Electrum, I select show Addresses, and the receiving address is there but the balance is zero.

I have shut down and restarted Electrum twice AND I have tried switching servers about a dozen times to force a sync. Balance is still zero.

What am I missing?