Welcome to the board. I find that wrapper splitting is more often than not related to the RH of the cigar being too high, or at least the filler is more moist than the wrapper.

Sometimes though, it is due to construction .....but if it spans several marca's it is less likely.

It could have something to do with the local humidity when smoking too, but I can't comment on that since I don't know where you are, or who you are. You know,all the things that are usually found in an introduction post.