Two UARTs do not function properly simultaneously

[dorong]

I am using two UARTs simultaneously.
The CPU is STM32H743. One UART is on UART 4 that transmits information to pc uart
And the other UART on UART 5 receives information from pc
If these UARTS function alone, they function well.
I am using the DMA idle function on the receive and the DMA function on the transmit
When they function together, the information is not properly received from the PC on UART 5.

Please help me resolve this issue

[TDK]

Multiple UARTs can work together at the same time. They are independent.

It's going to be hard to debug without seeing any code.