Items flying away from belt

[ChiefMonkengineer]

Client Information:
BYOND:516.1667
Key:ragantis

Round ID:

16901

Testmerges:

Master commit: 1a98021
Current commit: cdaace7aa30a57787e77560985623fead8f3939f

• [TM ONLY] Revert "Use sleep(world.tick_lag) instead of stoplag() in UNTIL and UNTIL_WHILE_EXISTS"
• Vampire: The Touchening (MRP2 TM ONLY)
• [PORT] Smooth Movement 5.4: Rock Bottom (GOLD) (MANY HAVE BEEN ASKING)
• TGUI unlimited windows preference.

Reproduction:

When items are picked up by a big manipulator at the end of the delivery belt, they begin moving north until they run into something, and when attempts are made to move them, then continue to fly north.