For some reason my balance is not the same on https://member.cash and https://member.electroncash.de
The balance will depend on the accuracy of the utxo server used. Try switching the utxo server if you're seeing an unusual result.
Do you know how to fix the UTXO server?
I don't know. I've found it quite difficult to find reliable pruned utxo server software.
I'm using my BCHD node at ryzen.electroncash.de:8335