Virtualbox freeze

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During working with VirtualBox and Windows 7, the guest freeze. Only by killing the process can solve the problem.

I attached the log.

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Here is a log snippet from Ubuntu jounralctrl

Jun 28 10:35:32 B450M-S2H kernel: VirtualBoxVM[33228]: segfault at 289 ip 00007f4ccfb3f9f8 sp 00007ffd347edd48 error 4 in libQt5Gui.so.5.12.8[7f4ccfaea000+41d000]
Jun 28 10:35:32 B450M-S2H kernel: Code: ff e8 2c ec fa ff e9 4c ff ff ff 0f 1f 80 00 00 00 00 48 89 de e8 98 e9 fa ff eb c7 66 0f 1f 44 00 00 f3 0f 1e fa 48 8b 47 08 <48> 83 78 78 00 0f 94 c0 c3 90 66 66 2e 0f 1f 84 00 00 00 00 00>
Jun 28 10:35:32 B450M-S2H systemd[1]: Starting Process error reports when automatic reporting is enabled...

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Crash file:

​https://filehorst.de/d/dkgCxpAk