Bank Rules not automatically matching

I have recently created some bank rules. When created, all the transactions that matched automatically disappeared. 

Since then, new transactions on bank feeds have not matched and automatically disappeared. 

However, if I go back into each bank rule, and save it, without changing anything, the matched transactions then disappear.

Then the next time I use MYOB, the same thing happens again. 

Is there a reason/setting that this is happening?