/dev/ttyAMA4 (UART) reading itself

Hi, im working on a project that uses all the uart ports on the pi4b, but when i was debugging i discoverd uart4 is reading itself when im wrting on uart 4 even when nothing is attached. Does anyone know how to fix?

Arm maybe its just broken

Both pins are showing a high value (rx and tx) on the picoscope

That's called echo. If it was listening to itself it would loop indefinitely.

Restarting the PI fixed it 🙈

Nvm it dint fix it <:skullcry:1192608598132535457>