I don't know what you mean problem with seeds, it could be PH problems and/or too many nutrients in the soil and/or light stress. I had the same thing on my 1st Wedding Cake Auto ( see my diary ) the photos look almost the same like my 1st Wedding Cake. I just kept an eye on water PH and ppm ; Soil PH and Runoff PH and ppm. Also I raised my light and dimmed it.
I think you should start like this and keep an eye on how she responds, but should get better.
I wish you good luck 👍😁