Hi
@Reedius in the case of your plant it seems to me excess water in the substrate and lack of air circulation. Control your subtract by the weight of the pot, the almost dry substrate makes the pot very light. intervals the space between irrigation, allows the substrate to almost dry between irrigation. put a fan blowing wind between the top of your plant and the light source, these little branches need a lot of air circulation to revitalize. good luck mate 👍