m0useanswered grow question 8mo ago One of the following IMO.
High Temps.
High RH
High Light Intensity
No diary so hard to pin point it.
Confirm your airflow is optimal and the temps are not to high. eg under 29c fan always on low or switching bettwen low and high in times of need.
Confirm your RH is not to high. eg between 40-70% Lower side the better
Confirm your lights are not to close or on to long. Reference your lights guide on how to use them with their hang height and hours of operation. To much light can stunt growth and bleach plant tips.
Sidenode, plants are looking extra Lush, might need to back off on the N a bit. Confirm your feeds. and start a diary then link it to the questions for better answers.