Very neat puzzle - was impressive how all the mechanics came together in the final single screen madness (Beated!)! There were some times that the glob couldn't collect the stars (i guess if one is travelling on the way it doesn't collect?)
Viewing post in The Glob jam comments
From what I've managed to nail down, it's the distance between start point and end point(or collected object) that affects what I've called the "phase through bug". Usually, while travelling, they do collect. It's the odd times when the distance is just so that they don't. It's due to how I handle movement.
I've mitigated it as best I could in the time limit, it used to be way worse.