Low Wi-Fi speed connection with IPad Pro in IOS 13.4

I’m working as a photographer and videographer in the fields. This hard drive with IPad Pro improve my workflow and I love it. But now a little problem makes me nervous more!

On IPad OS 13.4, the hard drive is connected at a low speed and this makes importing files too slow. The problem is solved by rebooting the IPad and Hard Drive, but after a few new connections it reappears. I can’t find roots of this problem.

I did not notice this problem in IOS 12, but the situation does not change with the release of new IPad OS firmware versions. Sometimes connection with HD is simply unstable and crashes on initial connection.

The hard drive is configured to work on a 5GHz only without connection to internet, the 1.04.17 firmware version installed.

Thank you!