"Forced hodling" :) Something like this had happened to me early last month. I couldn't move my Navcoin units from the Coinomi android. That's because Coinomi didn't upgrade to a mandatory Navcoin Core update and thereby running on the old chain.

There was the option to extract the private keys, which I did. Unfortunately I couldn't find the addresses which stored the bulk of my coins. So I was forced to wait for Coinomi to get on the right blockchain again.

It sure took its own sweet time to update. It finally did so late last week, and I signed on for the beta version to free up my Navcoin. The sweet thing is that Navcoin had gone up from $1-something to $4. I might have sold those units at lower prices had I managed to access them earlier :)