slack 4.0 error

[villain]

after upgrading to the latest version of the slack client for hubot, i've come across this:

slackapi/hubot-slack#328

error output:

Unhandled rejection SlackRTMError: invalid channel id
at RTMClient.handleMessageAck as _handleMessageAck
at RTMClient._handleWsMessageViaEventHandler (/home/user/hubot/node_modules/@slack/client/lib/clients/rtm/client.js:460:12)
at RTMClient.handleWsMessage (/home/user/hubot/node_modules/@slack/client/lib/clients/rtm/client.js:420:10)
at WebSocket.wrapper (/home/user/hubot/node_modules/lodash/lodash.js:4762:19)
at emitTwo (events.js:106:13)
at WebSocket.emit (events.js:191:7)
at Receiver.ontext (/home/user/hubot/node_modules/ws/lib/WebSocket.js:841:10)
at /home/user/hubot/node_modules/ws/lib/Receiver.js:536:18
at /home/user/hubot/node_modules/ws/lib/Receiver.js:368:7
at /home/user/hubot/node_modules/ws/lib/PerMessageDeflate.js:249:5
at afterWrite (_stream_writable.js:361:3)
at onwrite (_stream_writable.js:352:7)
at WritableState.onwrite (_stream_writable.js:89:5)
at afterTransform (_stream_transform.js:79:3)
at TransformState.afterTransform (_stream_transform.js:54:12)
at Zlib.callback (zlib.js:639:5)

channels are now referenced by id, not by name. re-subscribing to the events works, but that error above is printed to the hubot console each time

[spajus]

Did you try to unsubscribe all events and then do a fresh subscription? It could be old subscription is still in memory.