Yellow tips started appearing on new growth on this plant few days ago, slight clawing downwards. Some brown spots. I thought it was CalMag deficiency and fed them yesterday with CalMag+light nutes.
Seems like rootproblems. Lack of drainage might be causing it or if you let the plants sit in their runoff water it could be that. I hope this helps you to find a solution or someone with better understanding will answer you soon. Good luck!