I have come across lot of people complaining about this, and i Had same problem with a mobile game im trying to make, I wanted to have lots of various traps that would be able to push character, and i couldnt figure out how to do it well as when ever character is still, traps just went trough it
my solution? make character move ! if character is moving collision works
so on tick, i move my character 0.001 to left, then 0.001 to right, move amount is small enough not to be visible, and it makes character be pushed by moving objects 
may not be perfect but it works, hope this helps someone out there