Late "pop" of flame when fireplace is turned off

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Firegood22

New Member
May 3, 2025
2
Minnesota
I recently replaced the burner on my three sided LP gas fireplace. The install went fine and it starts and burns nicely; however, when I turn it off after several seconds there is a "pop" of flame in the back left corner near the air shutter (see video, wait for it, it takes a several seconds to appear). Is this anything to be concerned about? Ideas why it might be happening? I don't recall this happening with the burner I replaced. Thanks in advance.
 
I recently replaced the burner on my three sided LP gas fireplace. The install went fine and it starts and burns nicely; however, when I turn it off after several seconds there is a "pop" of flame in the back left corner near the air shutter (see video, wait for it, it takes a several seconds to appear). Is this anything to be concerned about? Ideas why it might be happening? I don't recall this happening with the burner I replaced. Thanks in advance.
View attachment 338627

Here is a post. It looks like unburned gases going off one last time.
 

Here is a post. It looks like unburned gases going off one last time.
That does sound like a similar situation. I’ll keep looking into it but sounds like something to not be too concerned about. Thank you.