Walker taking damage at the start of the match?

[azuzii]

So, we started a match and a few minutes later (not even 2 minutes in), I heard "Purple walker is under attack", then 1 minute or so after "Yellow walker is under attack". The server crashed, so I don't know if the devs have access to the replay, here is the matchID

Either someone was hacking or some weird bug.

EDIT:
Just to clarify, the enemy team did not even kill the guardians, so there is no way they got there.