Hi tommy and welcome to the Mattermost forums!
This sounds like an old issue I could find here:
https://mattermost.atlassian.net/browse/MM-41519
According to this ticket, the problem also applies to you because it’s also sending temp as a client ID here (see this screenshot of your video):
Not sure how this works with the zapier connectors for Mattermost, but can you verify that your Zapier setup is using the newest build (or at least version 1.9.1 as mentioned in the ticket)?