Error on master when dismissing new messages toast


Environment: master, found during PR testing
Not exactly sure of the repro steps, wasn't reproducing reliably on the test server and master

1) Open Off Topic as user-1
2) Open any thread in the RHS
3) Scroll away from bottom on the main channel view and RHS
4) On a different browser log in as user-2 and post few messages on the same channel from step 1, Off Topic
5) Place focus back on the 1st browser and click on x to dismiss new message toast

Expected: No errors

Actual: Console errors and banner present. I am not sure if it's caused by the actual dismissing of the banner, as it's not reproducing consistently using the same steps

QA Test Steps



Caleb Roseland
December 9, 2020, 6:38 PM

possible fix

Jelena Gilliam
December 8, 2020, 11:27 PM

Additional info: This is present on 5.30 and latest cloud (not on master). You only have to hover over X, no need for the click on any new message toast

Jelena Gilliam
November 10, 2020, 6:25 PM

I am not able to reproduce on 5.28 and 5.27

Amy Blais
November 10, 2020, 6:00 PM

Community is on v5.29-rc1, can you also help check if it's a regression?

Jelena Gilliam
November 10, 2020, 5:58 PM

re-tested and errors are also present on community 5.28, release and daily

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Jelena Gilliam

Fix versions

Mattermost Team

Sustained Engineering