Hello,
Tails on/off is a setting for when you bypass the Program, or Preset A/B. When you load or switch to a new program, that is Spillover (not tails).
I just tested this and if I assign Program or Preset bypass to a HotSwitch and tails is on, the delay tails will ring out correctly.
Can you please be more specific with what mapping you are making for your HotSwitch? Note that you must use H90 Control to map the bypass control to a HotSwitch.
You could send me a screenshot of your HotSwitch to help me understand what your mapping is.