Bluemix Blockchain service error with Fabric Composer

Using fabric composer v0.7.0 I have deployed a business network to a Blockchain service on Bluemix (v0.6).

After the app runs for a while I get the following error:

throw er; // Unhandled 'error' event
^

Error
at ClientDuplexStream._emitStatusIfDone (/home/vcap/app/node_modules/grpc/src/node/src/client.js:189:19)
at ClientDuplexStream._receiveStatus (/home/vcap/app/node_modules/grpc/src/node/src/client.js:169:8)

This sometimes happens when executing the composer network deploy command as well.

via Jeffrey