@RosaB can wwe get some pictures of the full plant in regular daylight 5000K with the grow lights turned off? then a description of the soil, water and nutrients used.
I have had problems with DP cheese autos in the past. They just did not like the nutrient schedule I was giving the other girls? They all made it to a good harvest but they were pretty ugly by then.
The other concern is environmental RH needs to be >40% <60%.