It may not be the most serious bug but to be shrugged off as just "randomness" is nonsense. How injuries work in this game is flawed, period.
If you're talking about how injuries are strictly caused by fouls, yes, that's ridiculous. It's a design decision, not a bug, but one that I (and many others I'm sure) would like to see addressed.
As far as the specific distribution of your injuries, it's no more a bug than if you happen to roll double ones twice in a row while playing Monopoly (though that would be actually very roughly six times less likely to happen than this). If something that is statistically unlikely to happen to a single person but expected to happen many times over the course of the population happens to a single person, it's not a bug. If you can demonstrate that over a random sample of a significant size that it's happening at a much greater frequency that should be represented in the sample, that could be evidence of a bug.
If something that is supposed to happen to some people happens in the game, it's not a bug when it happens to you. It's not shrugging it off as randomness - it's precisely what randomness is. God knows if you play HT at all you really should know that! It's the same thing - when something improbable happens, that's not a bug - when there's a major and statistically significant incidence of improbable events, that would be evidence of a bug. If you're just interested in complaining about the game, leave it at that - I have no problem with complaints about the injury system being poorly designed - but please be sure that you only use 'bug' when it's appropriate.