Long Holes In Bottom and Top Layer

I am currently printing two types of visors for making Face Shields. In both versions, printing on a Taz Workhorse and a Taz Pro produces the same issue; the bottom layer on the visor with only walls and the top layer on the other where only a wall should be closed at the top is actually open. You can see this in the attached images. I have tried increasing the number of bottom and top layers, but that’s not really helpful. Any other suggestions, aside from choosing a different design?