Agreed. I suspect it is why when you mention the 5 blinks, they don’t even try to debug further. They just replace them at that point for you.
It is a shame they didn’t make these flashable out in the field somehow. I bet this issue could probably be fixed by a new firmware, either by letting you burn your own MAC in, or rewriting the area that is losing the MAC.
You would hope the new ones they are sending have the problem fixed, but like you said, the confidence factor there isn’t too high. I am sure they know what the issue is, and how to fix it, but it might require a rework of the hardware and/or more expensive parts to fix it.
I guess we will know in a year, when the replacement’s battery die…
(It is unclear being proactive and replacing them a bit earlier fixes the issue… I wish they would tell us more about the issue…)