are you using the windows client?
Yes. 1.3 from palmd.
I implemented a checkpoint server yesterday to fix the forking problem, maybe you have a corrupt blockchain on your computer, try loading the client with the -rescan switch, or try redownloading the blockchain.
I deleted ALL outta .conf and wallet.dat. DELETED all addnode from .conf. Relaunched one night later, synched on the wrong fork. palmd gave me blockchain for me to be on the right fork.
I would be very surprised that your IP is banned, the fact that it's not showing on the explorer page doesn't mean your banned, it just means your are not connected to that node.
Just so you know, before activating the checkpoint server, I started 3 test nodes and within 24 hours, they were all on 3 different forks. Since the CP server has been added, they are all in sync.
I've been running my client and staking without issues, still have all my test nodes in sync, and I've had the highest stable connections count that I ever got on the GRW network.
so try the few things I suggested, it should all be good now
I solo mine and my last found blocks accepted invisible in the wallet.