This is observation based on following configuration done by #meshctl.

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Button 1 & 2 are related to GEN_ONOFF_CLIENT
Button 3 & 4 are related to GEN_LEVEL_CLIENT

As per my coding,
1. if Button 1 is pressed, then LED1 on all Boards turns ON.

2. if Button 2 is pressed, then LED1 on all Boards turns OFF.

3.if Button 3 is pressed, then it publishes value for eg. 2000.
   On subscriber side, it checks that value (since it is less than 10000 it turns ON LED3 & turns OFF LED4 )

4. if Button 4 is pressed, then it publishes value for eg. 15000.
   On subscriber side, it checks that value (since it is greater than 10000 it turns OFF LED 3 & turns ON LED4)

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Ideally, as per #meshctl configuration,

if I pressed Button1 on any board, then LED1 on all boards should turn ON & if pressed

pressed Button2 then LED1 should OFF.

And if I pressed Button3 or Button4 on Board1, it should affect LED3&4 on only self Board.

And if I pressed Button3 or Button4 on Board2, it should not affect LEDs on any Board.

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But here, I found strange behavior in case of Board2. Here without assigning subscription
addresses to Model 1002, LED 3 & LED 4 on Board 2 are reacting as soon as I pressed

Button 3&4 on Board 1.