3 Answers

No need to panic about banana fruit cracking. Amongst all the possible banana tree problems, this one is minimal. Why do bananas split on the bunch? The reason the fruit is cracking is likely due to high relative humidity of over 90% combined with temperatures over 70 F. (21 C.). This is especially true if bananas are left on the plant until ripe.

Read more at Gardening Know How: Banana Tree Problems: What Causes Bananas With Cracked Skin https://www.gardeningknowhow.com/edible/fruits/banana/bananas-with-cracked-skin.htm

It  could be because you have kept the banana in the refrigerator.

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