Webapp crashes after cancelling and removing post from /giphy

Description

Environment: community-daily

Repro steps:
1) Send `/giphy something`
2) Click the Cancel button on the resulting post from the Giphy integration
3) Click the X button at the right side of the `Cancelled giphy: "something"` post

Observed: The web app crashes and you have to refresh
Expected: The `Cancelled giphy: "something"` post disappears

QA Test Steps

See Description

Status

Mana

2

Assignee

Michael Kochell

Reporter

Harrison Healey

Epic Link

None

Fix versions

Mattermost Team

Integrations

Sprint

None

Labels

None

GitHub Issue

None

QA Assignee

Dylan Haussermann

QA Testing Areas

Plugins