UART1 TX not sending proper data

[GaneshPodPoint]

We have a unit in our client side and we have unusual behaviour in UART1. After debugging remotely, i found that TX pin is not sending the data. The pin for UART1 that i am using is

#define UART1_RX_PIN GPIO_NUM_22
#define UART1_TX_PIN GPIO_NUM_23

I did a soft reboot in ESP32 but did not recover.

Iam using ESP IDF v 3.1

Could anyone tell us what could be the reason that it did not recover after soft reboot?