Getting UART_ERROR_FRAMING issue

I am using Asynchronous API of uart to receive the data. During the reception I face UART_ERROR_FRAMING issue in UART_RX_STOP event. But after getting that too it enables the uart again and carry on with receiving the data but after sometime which is around 17-20min the data stops coming.
The baud rate is 9600 and is same for both the devices.

What can be the issue?
PLease suggest

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