@Kazso WOL doesn’t care about FOS period.
WOL is a network controller thing, not, specifically, an OS thing. While a running OS can set the firmware to allow/disable WOL on a network card, the actual reception and operation isn’t anywhere close to the OS layer.
To the point you’re referring to, there are some kernels that load the network accessible via firmware specific loaded drivers and those firmware may flip (temporarily) some options. By temporarily, usually we see this issue prop up from time to time, but after booting into the Windows Operating System or another OS where the settings for the card are adjusted to allow WOL things tend to work correction.
TLDR; The issue isn’t the operating system, it’s more likely the kernel’s firmware loading the network card drivers for use with FOS (and maybe other linux operating systems) that’s setting this WOL bit to a disabled state.