I'd guess automatic because few people are probably going to see you doing barrows too much, and if they did see you doing it that much, it would've been a permanent ban.
Normally, when a high-level account gets banned for a first time, really just an account with a lot of progress on it, it gets a 2-day ban before a permanent ban.
did 2 weeks of red chins on my other acc awhile back (it's 99 hunter now), and it only got a 2 day ban as well because it was level like... 90ish