How to prevent being swept by having your arm pulled when doing over under or bodylock pass?

Two different people have swept me the same way repeatedly when I do the over under or bodylock pass. I pass to my left side and opponents right. They pull on my right arm and sweep me to my right side. Not sure if they use the butterfly hook or not woth their right leg. I need to prevent their grip on my right arm but I think they first off balance and make me post and then grab it and sweep.

Any idea what I am talking about and how to prevent or counter it?