AMC playing defence

I dunno if this is a bug or not but it's now happened with more than 1 player. I play with two wide AMR/AML and two AMC's. I often noticed the AMC who plays on the right side of the forward line ends up playing in defence A LOT. Like sometimes more than the position he should be playing. I assumed it was perhaps just that particular player. But I now have a new guy playing that position and I am noticing he spends a lot of time back defending rather than playing up front. Neither of the players I've mentioned have particularly high defensive attributes so just wondering why this is happening. I'm fully aware players go back and defend but it seems odd that both these AMC's end up playing defence for a lot of the game (or the highlights anyway)

Anyone else experience this?