Probleme biobizz light mix(peat free)

based on how tight those sets of leaves are, you need to reduce light a bit -- this may be a temporary thing and it will need 'full' strength relative to climate and operating hours once it matures more. Also, don't put a tiny plant in a big pot. It's just a net-negative with zero benefit. It is an urban myth that potting up will shock a plant. Don't use the GI Joe Kung Fu Grip(tm) on the rootball and all is well. Easier to water properly and better rootball development when you use appropriately sized pots. since you have a huge pot, make sure that moisture goes all the way down or you train superficial roots.

Du meinst die kleine bisschen verbrannte Stelle oder das ist lichtstress würde ich mal sagen

It seems Like some lightstress buddy

whats the question. just states what your medium is? Best to water the entire pot as not to get dray spots. the roots will not grow out into dry bits.