Could relate to a previous question.

Boron deficiency it looks like to me. Prevention • Don’t let plants dry out often. • Avoid nutrient lockout by NOT overfeeding. • Don’t let humidity levels drop below 25%. • Use well-draining, aerated soil. • Add generous amounts of apples, bananas, broccoli, and chickpeas to your compost pile. Fixes • Flush the medium and aim for an ideal pH range. • Mix one teaspoon of boric acid in 4l of water and apply to affected plants. Hope this helps. 🤟😜