Yes, really shxtty stuff, there are other issues like https://github.com/BTCPrivate/BitcoinPrivate/issues/124

More funny in https://github.com/BTCPrivate/bitcoin-private-full-node-wallet/issues/32 is:

"balances from fork need to be sent in full to a Z address before being able to be spent normally.
provide more user-friendly error message when attempted."

I have some hard time to believe it, why? requirement of their wallet only? save some time before it is sent to an exchange? Then please someone try my tool, there are no reasons why you should send your coins to a z-address first

PS: and indeed we can't trust their explorer, whether down, not showing the utxos before the fork when up or strange info (intentional?)