Since the beginning of this week, many users of Ledger wallets began to report difficulties with access to their Bitcoin Cash assets. Problems arise when opening BCH wallets, checking balance or making transactions.
After ~20 hours, this issue is still not resolved. I can't access my BCH wallet at all (no transactions show up, despite being visible on an explorer). Also, the proposed solution of Electron Cash is buggy, slow and crashes every time I start up my ledger.
unknown9_ at Reddit
This what Ledger team reported on the issue.
The new version of Bitcoin-ABC (Bitcoin Cash node) breaks compatibility with our parser. As a result balances shown on the Ledger Wallet are incorrect. Our engineering team is currently working on a fix.
In subsequent updates, it was reported that the team had to transfer all 746 GB of blockchain data and resync the network. Subsequently, the process was delayed and the programmers had to optimize it.
As they say in the last message,"We had confirmation that BCH was now working and displaying the correct balance." and the team is working on "deploying the patches on our remaining BCH servers."