Can't enter text in pdf using hardware keyboard

[antonalekseevmyoffice]

Preconditions
hardware keyboard connected any way (e.g. plug type-C-usb-A connector and plug also Bluetooth receiver for keyboard OR use something like this - https://bluetooth-keyboard.com/support/)

Steps
try to add text in pdf document

Actual result
not works

Note
ComPdf Sample app v 2.6.7