020 crash in MakeCode v2 and MakeCode beta (06.08.20)

[RRWagner]

This program crashes when the encoder is turned rapidly left or right.

https://makecode.microbit.org/_TqjJ4m2pV3Xc

[targetarchitecture]

@RRWagner I think it's because you're trying to change display the LEDs using the events, if I put the LED parts into the main loop and just have the events set a variable it works.

https://makecode.microbit.org/_6P6gs49RjeLj

[RRWagner]

Yes, that alternate code worked. Thank you!

But I don't understand why LED control can't be within an event handler. Is that documented somewhere? Are there other blocks that can't be inside event handlers?