Update: I found the problem with the “buggy” network driver. It was actually the RAM which is behaving unstable. The RAM is Kingston HyperX Impact 8GB 2933MHz DDR4 CL17 – avoid it for the Odroid H2+. So both drivers should be stable enough.
Update 09.01.2021: I’ve built the driver for base 7.9 kernel so you can install it from a flash drive, without a usb lan card. See the downloads section below.
Update: I updated the module version to 9.009.02. Downloads at the bottom.