The player character was colliding with a blue platform in the game and remaining on top of it as intended. However, the platform was destroying itself too early, before fully passing through the playing area and while the player was still on it. To fix this, the developer made the scene size wider and moved the destroy platform actor further back, so the blue platform would only destroy itself after moving fully off the screen.

1. Destroy platform issue in
Alpha gameplay & Fix
As the player jumps on to the blue platform all is well
and the game is running smooth.
The player collides with the platform and stays on top
of the platform, ready to either jump off of it or simply
fall off the end when the platform has passed through
the playing area.
Frame 1
Here the player has a second or two to decide
wether to jump off of the platform or wait until it
passes though and off the screen.
Frame 2 (the next frame)
Where there is still a small amount of platform to
pass through until the player drops, the platform
prematurely destroys, which could be an irritation
for the player wanting to jump, but also looks glitchy.
This is because the destroy platform actor it too
close to the screen where the player collides with
platforms.
To fix this I made the scene size wider and moved
the destroy platform actor back, so the blue platform
would only destroy if off the screen.