I felt it was, Olusanya got to it a fraction before him and in the league with VAR it would have been given, hard for a ref to see in real time though.
I actually liked the lad, he has been around a bit for someone still quite young but he held his own physically and was a bit of a pest, absolutely could have seen red on a different day but would probably have been harsh.
Arbroath are a very streetwise team and worked the margins on what is acceptable, their 20 yard walks on throw ins and making a back for bigger players in the air were my favourites. DC has them well drilled.