With the release of Gridcoin v3.7.5.0 there have been major forking issues with no fix reported yet. Even the gridcoinstats.eu page lists at least 3 different forks.
Can anyone list any nodes that they believe to be on the main chain? Ie. If you have a difficulty that is above 0.5 then that may indicate that you are on the main chain. If so, would you be able to look into your .conf file and share what nodes you are using? For example, what comes after addnode= in your gridcoinresearch.conf file?
I am trying to go through the list of nodes here to find one on the main chain after performing a reorganize command as described by 
Hopefully by sharing we will be able to figure out the main chain and get more people on it. Although if the wallet is buggy we may have to continue to do this until the next release.
List nodes you've tried below in the comments section even if they haven't worked out!
So far with addnode=node.gridcoin.us I was stuck on my own fork.
Note: it is probably necessary to rename or backup and delete your peers.dat if you plan on experimenting with different nodes