B23.922 An Infantry unit which attempts to move or advance into a Fortified Building Location occupied by such a squad loses that MPh or APh capability for that turn and must remain in its present hex during that phase. The MF
expended (not lost) in an unsuccessful entry attempt are considered expended in its present hex for purposes of Residual FP (
A12.15), Defensive First Fire, Subsequent First Fire, or FPF;
A25.2322 If the HW Unit is unable to move to a new Location, it must spend its remaining Impulses in its current Location.
I have not been able to find an exception to B23.922 in the rules for either Human Wave or Banzai-ing units