Oneplus 6T fastboot freezes on TWRP install

[x] I am running an official build of TWRP, downloaded from https://twrp.me/Devices/
[x] I am running the latest version of TWRP
[x] I have read the FAQ (https://twrp.me/FAQ/)
[x] I have searched for my issue and it does not already exist

Device codename: fajita TWRP version: twrp-3.3.1-1-fajita.img

I am using the Oneplus 6T android 10 with OxygenOS 10.3.3

WHAT STEPS WILL REPRODUCE THE PROBLEM?

Following the instructions here https://twrp.me/oneplus/oneplus6t.html Problem is at "run this command on your computer fastboot boot"

WHAT IS THE EXPECTED RESULT?

Expected result is phone temporarily boots into TWRP so that I can install the zip.

WHAT HAPPENS INSTEAD?

Recovery mode wont boot and phone gets frozen in fastboot. Will only unfreeze by hard reset holding down volume buttons and power.

ADDITIONAL INFORMATION

According the XDA forum the TWRP is different depending on Android version, however there is only one build available. See link here https://forum.xda-developers.com/showpost.php?p=82459161&postcount=3902 The documentation should be updated b/c it seems it's not possible to install TWRP on this device right now when using Android 10

TeamWin / android_bootable_recovery