Version: 1.6.4-4.3.7.32
Description: I have several red alloy wires that are connected to various blocks and things work fine. However, when I exit my map (but DON'T exit MC) and reload my map then all those wires no longer connect to the block. At this point replacing the wires doesn't help. The wires stay unconnected. The only way to fix this issue is to exit MC and load the map again.

It feels as if some variable/flag is being set globally and not initialized properly when the map is loaded (as opposed to when MC just started up fresh).

I have two screenshots of the same spot. Here is the wires working properly:

And here you see the wires not connecting properly:

can't reproduce. Not happening for me