The radio part does not take effect on hardware

[Sheila111]

Describe the bug
The radio part does not take effect on hardware

Steps to reproduce the behavior
1.Navigate to https://makecode.microbit.org/beta#
2.Radio Games---->Mood Radio
3.Show Instructions
4.Click "Download"
5.Run it on the hardware

Expect behavior
This project uses the radio to share your mood with other micro:bits. When you press A, other microbit will see a smiley face too. When you press B, other microbit will also see a frowny face.

Actual behavior
It just shows happy image when pressing button A. Another microbit shows nothing.
It seems that the radio part does not take effect on hardware

Additional context
1.OS: Windows(rs6)
2.makecode.microbit.org version: 2.3.15
3.Microsoft MakeCode version: 5.37.25
4.The live version runs normally on hardware

[abchatra]

@Sheila111 What is the behavior in live? (Is this a regression)?
Also try Radio -> "Set Group" in On Start and see if the issue goes away

[Sheila111]

@abchatra The live version runs normally on hardware even if I don't add "Set Group" in On Start.
And I tried Radio -> "Set Group" in On Start and the issue doesn't go away.

[mmoskal]

works for me on master

[pelikhan]

I can repro on /beta.

[pelikhan]

It works on /beta after setting the group in onstart.

[abchatra]

@finneyj @jamesadevine

[pelikhan]

We need to verify that we generate the same program hash on every compile. This works by setting group so it might be that our program hash is not stable anymore.

[pelikhan]

@mmoskal did we introduce a random seed in the generated code?

[mmoskal]

it's the incremental compilation I think