kuresimon

I have a problem with CURA, i have tried in both version 4.4 and 4.3, but the same problem occurs in both. The problem is that I need to print a lot of the same object. It works fine if I slice the object alone, but if I add multiple versions of the same object it removes an importent part. This picture illustrates how it is suposed to look, and how it looks when only one object is sliced. This picture illustrates how it looks if I slice multiple of the object. As you can see, when slicing more of the object it removes the middle hole. Does anybody have a fix for this problem?