There is plenty fresh air in the cabinet, air filtering is good with a passive air intake and circulation fan.
Root damage was an issue when I put her into soil, the stem wasn't down into the soil and got burned by the light. She has survived however. I nticed it an quickly put her down properly.
I have seen somewhere else in AFN that early root damage can cause this too, but I think after 34 days she would be over it.
I think also that the bottom half o the new root has broken off and the new growth has taken longer to establish
So Im hoping it will recover soon as she will be ready to flower soon