Carrying a position into a shorter cut of the same film — two hours into a
90-minute source — leaves the engine unable to ever report that time, so the
one-shot latch never released: every position save was suppressed for the
rest of the session, and the impossible start time kept being reported to
multi-source for the next switch.
The latch now also opens when a known duration puts the requested point out
of reach, while a reachable one still waits as before.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
