Now this is an interesting issue! 😉
Well, maybe some kernel behaviour was changed, that affects timing and whatnot.
I’d look into the kernel changes between F8 and F10. Especially regarding network stuff, and probably those network drivers.
The fact that you get the same behaviour with two different NICs indicates that the problem might not be with a device driver, but rather somewhere in the stack.
I could think of timing issues, or whatnot.
To drop a famous quote here: We’re still puzzled, but on a much higher level! ! 😉