strangest bug..

I have encountered many weird bugs, but this one really baffles me.
My levels are all on the same frame (each loads from array), and to keep the music playing i use "jump to level" on the same frame.

The problem is, on IOS it completely messes up, the new level doesn`t load, and here is what is really strange..
On the top i have a text string displaying the current level, it is displayed as "Sector 1A" then "Sector 1B" etc.
When the next empty level starts, it just says "1". But i have no events that would cause this.
The default string is "debug" (so with no events that`s what it should say) and the events say something like: "Sector "+Str$(sector+1)+"A"

Now when i replace "jump to frame" with "restart current frame" it works just fine, except the music stops...

Just fine might be a overstatement.. it crashes on a specific level that's pretty small and without anything special.