A few things. Walt, just a small point of clarification. Your HD ticket did not indicate you had a confirmed bug, but the behavior could be a possible software defect and it was being investigated further.
Second. Persistence is band-centric, not mode-centric. Meaning if you change modes but not bands, the only parameter that is persisted in the RX filter. If you changed bands and set up a different mode and then switched back to the previous band, then the slice parameters are persisted.