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HardwareSerial setTxInvert does not change the idle state on STM32G4xx #2942

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So apparently setTxInvert does not change the idle state on STM32G4xx, (tested on G473VET6).
I would expect the idle stat to be low when setTxInvert is enabled. Is there another bit to change the idle state?

without setTxInvert
Image

with setTxInvert
Image

The specific port i used is PD8 and the baudrate is 8M

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