Orion 24/12/20 rebulk issue

I have an Orion 24/12/20 connected to a 24v 100ah lifepo4 battery.

It transfers power from this battery to a 12v 200ah lifepo4

I’ve set the lockout voltage and restart which works fine but the automatic rebulk feature does not seem to work. If during transfer the 12v battery is full because this also has solar connected the Orion goes into float

But no matter what setting I try even when the 12vdc depleted to say 30% the automatic rebulk does not kick in and the Orion simply stays in float until I cycle the power on/off at which point it transfer remaining power until lockout