Pop exported on loops

When I create loops inside Cubase they loop seamlessly without any artifacts.
When I export the loops in .wav, some files create a pop between the start and end point.
This pop is audible through multiple audio players but also within Cubase if the file is imported.

For example in picture 1, the first file is playing correct but the second one has a pop on import


When i compared both files, it seemed like the exported file is a little bit longer in length
2.JPG
Have you ever encountered anything like this before?
Why is this happening? Is Cubase unable to calculate the export correctly?