(LSJ) Sunset Strip Q

[Mongrel (MDH)]

Player A controls the Sunset Strip and taps it on his turn to give all
vampires +1 stealth on hunt actions "until your next untap phase".
Then, on Player B's turn, Player B calls Disputed Territory and takes
control of Sunset Strip.

Does the +1 stealth effect still last until player A's untap phase, or
does it now linger until Player B's untap phase?

Thanks,

Matt H.

[LSJ]

A's untap. It isn't a "while Sunset Strip is tapped ..." effect. You tap it to
produce an effect.