Vertical stacks and picks

Question on a situation that happened a few years ago. Not sure why it popped into my head today.

When receiving a pull I was lined up in the back of a vertical stack and was the first player to cut. My defender decided to position himself on the break side of the stack, and given where the handler was, the stack was fully between him and the disc. We were not making that throw ever and it probably should not have been his priority to cover that side.

My cut was to the disc, and he of course called a pick immediately because the entire stack was in his way. I just let it go at the time, but ever since then I have always just thought it was bad positioning on his part (whether intentional or not) rather than a foul on my part.

It seems like he either didn’t know where to defend, which I don’t think is the case, or he was trying to force me to go deep as that was the only way to not get a pick. Is that a thing?

Maybe I didn’t look hard enough l, but I didn’t see this addressed in the rules. I don’t play at a high level, so if this is a tactic of some sort I am completely unaware of it.

Any insight would be awesome thanks!