in the north of level 24, there is an obstacle which changes its type as you
step on the trigger.
the collrect however doesn't get updated, because change_obstacle_type doesn't
unglue/glue the changed obstacle but only changes its type.

 version 0.15-194-g83d039e.

What is the obstacle in question ?

The function is the problem. Issue is clearly reproducible with the trigger on
(43|4) on level 24 (and the changing obstacle).

This must be solved for the next release.

I confirmed the issue on level 24 but couldn't solve it. The issue appears to
only happen in games started from the Level Editor. If saved, and then loaded
from save, there seems to be no problem with the collrect updating.

This does not seem to affect the "Town-NorthGateGuard.dialog", which correctly
opens and closes the gates with no problem (even when started from the Level
Editor).

 I did find a number of things that are working correctly:
- Automap (updates correctly)
- blit_obstacle_collision_rectangle() in view.c

Puzzling. But perhaps not essential to be solved before next release, since it
only seems to occur outside of standard gameplay?

Fixed in commit ea68a4350b769fa08bbabbacf0bd9962c90fa3d0