Big Sur 11.2.2 and 32 bit startup disk using 10.14.4
I have an alternate startup disk on my main drive to run 10.14.4 in order to run 32 bit compatible applications/games. Before upgrading to Big Sur this worked fine. Using the Startup Disk control panel I could switch back and forth without trouble. This time after booting into 32 bit the old OS reports an incompatible disk error, namely the Big Sur partition, and the Big Sur partition is no longer selectable in the old Startup Disk control panel. Thus it is not possible to reboot back into Big Sur using the control panel.
There is a workaround by holding down option during a restart which allows me to select a startup partition and this works, thankfully. However this seems to be a shaky workaround, and I would get locked out if this stopped working. Of course, anyone who did this and didn't know this trick would be immediately locked out of the Big Sur partition which could be disastrous.
So how safe is it for me to continue to use this workaround, and can this be fixed to make the old OS recognize the Big Sur partition transparently?
iMac 27″, macOS 10.12