@user104751, I think you get some noise and may be additional signals that makes your interrupt buffer to overflow...
If your receiver is just sticked into puck's thru holes and the leads do not make good contact, lightest vibration - even from loud sound / music - give you additional signals and buffer overruns.
With additional signals may come from other sources or reflections.
Also, if you keep sending the buffer may overflow.
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@user104751, I think you get some noise and may be additional signals that makes your interrupt buffer to overflow...
If your receiver is just sticked into puck's thru holes and the leads do not make good contact, lightest vibration - even from loud sound / music - give you additional signals and buffer overruns.
With additional signals may come from other sources or reflections.
Also, if you keep sending the buffer may overflow.