Ok, 908 makes more sense, more like I was thinking anyway. Do you have reduced stroke buffers with physical switches in the hoistway in addition to vanes? They would occupy the first like 8 I/Os ETU1, ETD1, ETU2, ETD2, etc. if you do, make sure all are high when the car is in the middle of the hoistway.

Or
You may have some bad data in the DSP for ETS tables. Put car in the middle of the hoistway on inspect. In this order, cycle CPU power, NTSI, ETSI, TBSS, Y, ETSS, Y, cycle CPU power again, NTSI, ETSI, TBSS, Y, ETSS, Y, cycle CPU power again, take car to bottom on inspect, put on auto, do a backup scan.

If that doesn’t work, check the snubbers on NCNT, NDET, ECNT, EDET inputs. If you position encoder is the optical wheel in gov, check alignment and clean wheel.

And it was said above but is worth saying again, make sure there isn’t excessive AC from V+ to VC