Potatoes break during night time.

Only happens at night time.
Also I'm unable to plant them cause they break.

Thank you for your report!
However, this issue has been closed as Working as Intended.

Planted seeds need at least a light level of 9 in the block above them to grow or be exposed to the sky.

Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Feedback – 📖 Game Wiki