Dual boot MacBook Pro 14.1 w/ Mojave/Ubuntu 22.04 won't set permanently macOS as default boot option after each Ubuntu session

I just installed Ubuntu 22.04 on a partition. I'd like macOS 10.14.6 to be the default system to boot and having the possibility to choose Ubuntu only if I hold option key to get into the Mac startup manager, but Ubuntu takes over as the default system every time after I log into it.
My first try was changing the boot order with

efibootmgr -o xxxx,xxxx

, and the second one was entering the Mac startup manager by holding option, then select the macOS option by pressing ctrl while clicking on the ↑ icon under macOS boot device.
Both work on the immediate (I automatically log into macOS if I reboot from both systems) but the first time I boot Ubuntu one of the described actions need to be remade (boot order is reset and Ubuntu is first again), otherwise if I reboot the computer, I need to get into the startup manager to not get automatically into Ubuntu.
How could I **permanently** set macOS as the default boot option independently from the last used OS?