I know I had trouble once when I was switching devices using the bitshares wallet. 

You're bitshares wallet is device specific, which is why you should always back it up. 

You can restore your wallet from a back-up using the following instructions at wallet.bitshares.org.

Also, you could consider reaching out to openledger support directly. I've had good luck with them, but sometimes it takes some time.

Hope this helps!