Hello, many mi 13 ultra (ishtar) owners have had problems. I do every eu rom installation as follows, I did not encounter any errors or problems.
I have never installed a rom on this device via twrp yet. In fastboot mode "install_and_format_data" I do a clean installation with the option. When the phone boots up in a healthy way, I put it back in fastboot mode and install the appropriate twrp (
https://sourceforge.net/projects/recovery-for-xiaomi-devices/files/ishtar/). From the Wipe section, select "swipe to foctory reset". After that, the device started in a healthy way and I did not have any problems.
The only problem I've seen so far is that changes made in ai eraser pro mode are not saved. I hope it will be useful.
In the initial setup, there were stutters in the interface. Give the rum some time to set. You'll have a much more streamlined interface.
Thank you very much to the Eu team.