"Auto-resize guest display" feature unstable

[i8329]

I am talking about this feature: ​https://ma.ttias.be/auto-resize-screen-size-windows-10-guest-vms-virtualbox/

I am running Windows 10 guest under Windows 10 host.

After I start virtual machine: Guest display is autoresized, but "Auto-resize guest display" checkbox inside top menu bar is disabled (greyed).

After I login to my Windows account on guest system: "Auto-resize guest display" checkbox is enabled, but it does not do anything. I would expect that when I uncheck this checkbox guest display would toggle to fixed size and when I check it guest display would toggle to flexible size. However, this does not happen. Guest display does not react to checking/unchecking "Auto-resize guest display" checkbox.

If I click on "Resize to ...": Guest display toggles to fixed size, however "Auto-resize guest display" checkbox remains checked. So, checkbox does not reflect current state of guest display. Next, to return to flexible size I need to click on checkbox twice: the first click will uncheck checkbox and the second click will check checkbox and return display to flexible size.

For me it would be logical if: "Auto-resize guest display" option would move to the same menu with "Resize to ...". Then I would have: "640x480 resolution", "800x600 resolution", ..., "Auto-resize guest display". Then only one option can be enabled at the same time. Current situation when I can have "640x480 resolution" and "Auto-resize guest display" enabled at the same time is against the logic. The screen can't have two different sizes at the same time.

But most important issue is: After some time "Auto-resize guest display" features breaks, guest display toggles back to fixed size and does not react to "Auto-resize guest display" checkbox any more. I have to reboot to toggle flexible display size on. This happens occasionally. I suspect that this may happen when host system goes to sleep mode or other kind of waiting mode, but I can't say for sure.

[i8329]

Log file

[i8329]

I have left my PC turned on for the night and in the morning found the same issue:

1. Virtual machine switched back to fixed screen size on its own
2. Virtual machine does not react to "Auto-resize guest display" checkbox
3. Also, virtual machine does not react to any "Resize to ..." button

Log file is attached

[i8329]

Log file 2

[i8329]

Uploaded another log.

This time, virtual machine switch to auto-resize mode upon startup, but almost immediately (within several minutes) rolled back to fixed size mode.

Additional comments:

1. Sometimes virtual machine switches to auto-resize mode before I login to Windows account and sometimes it happens only after I login. Is it normal? I think that when some feature is stable it should work the same way all the time.

2. I have Commodo internet security installed on Virtual machine.