I had an autoswitch on with mine for a few years.......it wasn't a NN one though, it was a Rob Farmer one, but I presume they work in the same way
The signalminder is literally a plug and play replacement jobby, so if there were any problems, you'd know about them immediately without wasting any time doing wiring etc
The only problem i've had with mine has been the additional vectralights that run off the signalminder.....the RJ45 plugs stick up a bit proud of the top of the fuse box so after a long while, mine occasionally now throw a wobbly when my vast bulk bounces on the seat and thus the fuse box lid
Vectralights are neat though, if you have big panniers that obscure the line of sight to the indicators from the rear/sides
I presume the autoswitch is controlling some sort of aux lights?
The only wiring with the signal minder is the tap into the brake signal line to pause the auto-cancel indicator function when braking, but I can't see why it would affect the autoswitch
Sorry Bowser, you're going to need someone better than me on electrickery.....your problem doesn't seem logical, assuming that the AS is only for aux lights, as that, and the relay it is presumably switching, are different circuits.