Hello   I have fitted some Bachmann 36-553 chips into some Bachmann locos, all worked perfectly before chipping, and upon returning to speed step 0 they all speed up and do two revolutions at a faster speed rather than stop smoothly. This is happening in certain locos and fitting the chip in another engine the fault is no longer present   so far it’s happened on Bachmann K3 Ivatt 4MT 2-6-0 Standard 4MT 2-6-0 56xx Ivatt 2 2-6-0 (chip in tender)