I have a similar issue with resizing.

I have a devuan ascii host.

I find that if I resize the booted guest vm to the size I want, then reboot
the guest fills the desired size.

But I agree it should resize the guest as the window is being dragged.

More likely a virtualbox issue though

On Sun, Jun 7, 2020 at 4:30 PM spiralofhope <spiralofhope@???>
wrote:

> I succesfully installed Devuan:
>
> devuan_beowulf_3.0.0_amd64 guest
> on VirtualBox 6.0.20-137117
> on Windows 10 host
>
> This replaces Debian:
>
> Debian 10.1.0-amd64-xfce-CD-1 guest
> on VirtualBox 6.0.22-137980
> on Windows 10 host
>
> --
>
> I have no complaints with my installation, including nuances available
> only through the VirtualBox "Guest Additions" (shared folders,
> copy-paste, dual screens).
>
> One minor issue is that it does not resize into my full desktop
> resolution when I fullscreen, but I don't care.
>
> Fine work guys!
>
> I had an intermittent audio hiccup issue under Debian 10.1.0-amd64
> which I have yet to reproduce under Devuan.
>
> --
>
> Note that I had persistent issues using other versions of VirtualBox
> which were solved with the specific version/build "6.0.20-137117":
>
> https://download.virtualbox.org/virtualbox/6.0.20/
>
> e.g. for Windows host:
>
>
> https://download.virtualbox.org/virtualbox/6.0.20/VirtualBox-6.0.20-137117-Win.exe
>
> https://download.virtualbox.org/virtualbox/6.0.20/Oracle_VM_VirtualBox_Extension_Pack-6.0.20-137117.vbox-extpack
>
> https://download.virtualbox.org/virtualbox/6.0.20/VBoxGuestAdditions_6.0.20.iso
>
> --
>
> Notes and troubleshooting:
>
>
> https://blog.spiralofhope.com/?p=6969#2020-06-05_6.0.20-137117_Devuan-beowulf_3.0.0_amd64
>
> https://blog.spiralofhope.com/?p=5856#2020-06-05_devuan_beowulf_3.0.0_amd64
>
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