It seems in watching our DBs they tend to go for the "strip" tackle rather than the clean, take down tackle. It seems lots of time, when they have the receiver lined up, instead of "running through" for a take down, they reach around and try to strip the ball for a forced fumble. The other coomon technique is to throw their body at the receiver's legs, rather than tackling.
Either way, the receiver is able to spin off and gain additional yards. Most are adept at protecting the ball, especially when the tackler is approaching from behind.
Of course, to beat my dead dog, in the current CFL, you can't touch or impede any receiver from five yards until someone has touched the ball, so with a QB like Ray, it is basically pitch and catch and tackle football. Bad tackling technique IMO equals lots of field position lost and lots of points scored against you.