Well that is a first ! Anyway for all permanently 1 way streets it just shouldn't be. You understand my issue with these modules is that people put multiple modules in a chain, all with a terminator on there, that is bound to cause issues. One doesn't. Mind you, the DMX fixture the OP is using, being the last Fixture in the chain, should actually have a terminator, and probably doesn't. A male XLR plug with a 120R resistor between pins 2 & 3 is specified. (some fixture have switches that enable the terminator, and well those switches get flicked incorrectly as well ) Again in most cases, issues don't show up on short leads, but any DMX chain should be properly terminated or the cables, even though shielded, will start to act as antenna, and may (and i have seen this only once) and will start to pick up stuff. At 10 meter chain length you becomes susceptible to 5G signal.