[bug] (critical) the mouse cursor disappears

[Mynameis]

Tested:
1. Host: Debian 12 or Gentoo
2. Guest: Debian 12/Ubuntu 20.04
3. Versions: 6.1.50, 7.0.6-7.0.16
4. Drivers: libinput or evdev
5. DE: icewm 2.2.7, 3.3.1, 3.4.1, 3.4.7; kwin + lxqt, xfwm + lxqt
6. xorg: 21.1.13, mesa: 24.0.4
7. vm configured with default

Started from both GPU Intel or GPU NVIDIA
HW: 11800H, 3070

the essence of the bug: if you switch between the windows of virtualbox (two guests launched), then the mouse cursor disappears and it can be returned only through Reset

manifests itself only when working with VirtualBox, there is no bug with other programs

[Mynameis]

ideas?

[Mynameis]

Machine -> Disabling Mouse Integration

didn't help me