Bugs remaining in MCreator 1.7.2

I have noticed that there are quite a few bugs that were not fixed when MCreator updated from 1.6.3 to 1.7.2. Here's a list of those I have already encountered

-Zombie Pigmen spawn from any mod-introduced portal at an astonishing rate and will swarm an area in less than a minute

-If you die in a mod-introduced dimension and go back through the portal after respwaning, the game crashes and the save gets corrupted.

-Ghost entities and items are created whenever an event makes items or entities spawn in the world and don't go away unless burned.

- setting the harvest level of a block to 1 does nothing, and it can still be mined by hand.

I'm quite dissapointed with this, especially the first two, since they were not a problem in  MCreator 1.6.6- which was only one update past 1.6.3. I would have thoguht that the fixes to these bugs would have been carried over to all newer version,, but I guess I was wrong.

My reccomendation: Re-update the program to remove these bugs. Please.

If anyone knows how to fix these (once again, ESPECIALLY the first two) with code, I'll accept that too.