Yep, the same for me.
I just got a 4826B, and it clearly
does not play well with my LM14A 2-way Lamp Modules.
No problems with any of my other modules, just the LM14A's.
In playing around with it, the problem appears to be between the LM14A's trying to return status,
and the 4826 trying to repeat that status. The LM14A "sees" the repeat as a collision, and subsequently
tries to return status again. The 4826 tries to repeat it again. Etc. Etc.
The result is the 4826's A-side LED blink. Then the B-side. A-side. B-side. Over and over again,
ping ponging back and forth.
Until you unplug either the LM14A or the 4826.
My suggestion, is that if you any 2-way modules, to
avoid the 4826A or 4826B.
BTW,
has anyone else reported this is Smarthome's Tech Support? I just tried, and they claim to
have never had anyone else report it (implying it is just me, and not their 4826).