maybe it is hdd sleep issue? it dumps file into ram, hdd idles, sleeps, laptop disconnects (due to some arcane parameter), it queries it, then it takes time to spin? does same thing happens if you actively do other stuff on hdd (opening/closing file every 2 min for example)?
So guess russians will have to maintain their own fork of the kernel, and do their stuff on it? 🤷 as I’ve understood, they are (mainly or wholly) driver maintainers for some russian hardware