It seems like tor stopped playing nice with certain Linux kernels. Transparent proxying, which seems to be a very important feature, have stopped working. For example see these bug reports:
Does this have any impact on Whonix?
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Debian stable doesn’t include either kernel version so it should be fixed long before it could affect us.
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The bug on Tor bug tracker was marked as won’t fix, since it looks like Tor devs preferred to shift the trouble to the Linux kernel.