stepHPDrain counts drainHold down to 0 as the last step of every phase
(pixel slide, HP-number step, closing frames) but never let go of the
field afterward, so it sat at 0 -- not nil -- for the rest of the
battle. BattleSafety.inspect uses drainHold ~= nil as its
settled-presentation gate for checkpoint capture, so the very first HP
change in a battle permanently refused every checkpoint after it with
battle_phase_busy, even once the bar had long since caught up.
Only nil the field when the whole drain is actually over (bar pixel,
HP number and the closing-frame hold all settled), not on every
mid-sequence 0 -- a fresh HP change still needs drainHold to read as
busy so BattleSafety keeps refusing captures until that one settles
too.
sanjinpepic
bryanthaboi
MaxTomahawk