Serial Hexadecimal Write Issue

[karaketir16]

Describe the problem:
Writing Serialport as Hexadecimal causes wrong data send.

Here I created a loopback device and send aa and receive ef bd bf.

I listened hardware with a logic analyzer. The problem is in sending part, not reading. Using other programs then tabby it runs correctly.

To Reproduce:
Setup a device with loopback.
Set input and output as hexadecimal.
Send aa