Here is a link that explains possibilities for hollow fruit. I have never had a hollow fruit from any variety, so I could not offer a personal explanation. I have also harvested thousands of Mat-Su fruit, so I am quite sure it is not genetic. However it may be susceptible to it under some conditions. Keep us posted TV's
https://www.gardeningknowhow.com/edi...low-inside.htm
http://edis.ifas.ufl.edu/hs200