Duckling died because of membrane

[FarmInProgress]

So I have 75% humidity for lockdown for my duck eggs. One of my duck eggs pipped early and didn’t move for 48 hours, So I took the tweezers investigated. The duckling was dead, it got vacuum sealed but I don’t know how since I have high humidity. Now I’m worried that the other ones that haven’t pipped are vacuum sealed Please help!

 

[wilwingswaterfowl]

I had this issue last year after the first one died I helped the rest hatch.