Dual boot settings needed

I can not find this one and would appreciate a lot same of your help.

I have two OSs, Windows 10 x32 (needed for some software) or OS1 and Windows x64 or OS2 on separate hard drives. What is the problem? If I boot and load Windows 10 x32 and make shutdown, after I start computer, I probably will have screen where I can choose one of two OSs with certain amount of time (15 seconds) to make my choice. This is all right.

The problem here is that if I was on OS1, and made a shutdown, when I turn on computer, blue screen with dual options would appear and then if I choose OS1 again, I expect that my OS1 would load normally without restart. But it do not.

The same scenario with OS2 but with a problem. If I was on OS2 and shut down computer, next time I turn it on, blue screen with dual boot options came, if I choose OS2, I expect the same, that computer would continue to OS2 without restarting.

Fast boot options are disabled on both OSs. If I make Fast Boot set on, then there is no blue screen with dual boot opetions, it just continue to last OS I used.

The question.

I would appreciate a lot of someone could give me a clue how to make settings (registry, group policy, services or anything else) with scenario that shut down procedure remembers last OS i used and when I turn on computer and choose that OS on blue screen dual boot settings menu, to make computer resume to load that OS without restart. The problem probably is in situation that Windows mount wrong hard drive during shut down procedure. Is there some shutdown.exe with some options to use for which I could make a shortcut to my desktop?

I am aware that scenario if i choose different OS needs to restart computer, but if I choose the same one I made shut down, I expect to continue loading OS normally without unnecessary restarting.

This scenarios came with 1903 version of Windows, meaning that I had my wished scenarios with previous versions 1803 or 1809. Something probably has changed.