Yep, this is fairly common with these style of LED bulbs. I know manufacturers think it looks pretty to have everything in one contained unit... but things work so much better when you separate the electronics from the heat. When I build LED housings I almost always try to move the PCB's to a separate box away from the LED and its heatsinks.

Good work on finding the poor solder joint for the LEDs. Those boards don't look that great so hopefully they will last you after getting the LED joints repaired.

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