Hello, and welcome.
OpenBSD produces a kernel message buffer, called a dmesg(8). This is the white text on blue background one sees on amd64 or i386 architecture systems with video cards. This buffer is critical to obtaining any sort of support from the OpenBSD Project. In particular, it describes OpenBSD's view of the hardware configuration.
From your
prior thread it appears you have no way to successfully enter any keystrokes -- such as requested the shell and capturing the dmesg() to a file.
When the hub ceases to function, are there any kernel messages about the hub failure? If so, those might be reported to the Project, via photograph or manually writing out the messages.
An informal query to Project's misc@ mailing list may provide you with additional insight; it is possible someone else is using (or has tested) similar hardware and there may be a way to circumvent the problem. Or you may get a definitive answer as to why you will not be able to use this hardware with this OS.
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It is possible this is a problem with the RAMDISK kernel only, and not with the GENERIC kernel. One possible way to determine if this is the case is to complete your installation from within a virtual machine from within one of your working OSes, and then test that installed OS on the real hardware after you complete the installation.