[Bug] Slack Direct breaks new version of Slack

[jonalmeida]

STR:

1. Open slack in Firefox (with addon installed)
2. Switch between channels.

Expected:

• Channel switching works without any issues.

Actual:

• Slack shows a header error 'Something went wrong 🐢'

Device information:

Firefox: 70.0a1 (2019-07-11) (64-bit)
OS: Mac 10.14.3 (18D109)
Slack web app: Today (11/07/2019)

[chutten]

Odd, it's working for me at the moment. I'm on Linux, but that shouldn't make a difference.

@jonalmeida Is this behaviour limited to only some Slack instances? Maybe Slack serves different versions of their frontends to different instances... or users.

[jonalmeida]

Hmm.. if it works for you, it should work for me too on the moz slack but I'm seeing the issue when I switch from #android-components to #reference-browser. If I switch between #cats and #gv, I don't see this.

[chutten]

I just joined and played around with those two channels. Since Slack Direct is just a mutation observer, I tried leaving unsent messages in those channels to force them to move to Drafts and then back again, but nothing seems to trigger it for me.

When it's broken, could you inspect the channel names in the channel list and tell me whether the href are well-formed (just in case, maybe don't publish them here on GitHub)?