Okay, I've got a really frustrating problem that's been bothering me.
In both my completed game and my in-progress sequel, physics objects (like the metallic shrapnel or blood that flies off of a player/enemy on hit) will freeze in place after you die and reload a checkpoint. This doesn't happen in the minimal CAPX I built for this purpose so it must be a bug in my code, but I cannot for the life of me find it.
Here's my working minimal example: https://www.dropbox.com/s/of4l9fsal6ssr7q/Physics%20Freeze%20Demo.capx?dl=0
As the on-screen text tells you, you can save and load the demo's state with Enter and Space.
Here's my example with the bug: https://www.dropbox.com/s/gbdxgcf9w2riyaz/Physics%20Freeze%20Bug.capx?dl=0
This is a stripped-down version of my game, with just about everything irrelevant removed.
1. Hold D to move right, and you'll run into the enemy and see a spray of red pixels when you hit it.
2. Run into the enemy again to have it kill you. Notice the spray of red pixels again. The game will reload the save.
3. Run into the enemy again. Notice the pixels will all stay in one place.
4. The red pixels may start moving again as if nothing happened after an indeterminate amount of time.
The relevant code is in the event sheet #Player, under the group "Player Collisions".
A thousand thanks to anyone who can figure out what's going wrong!