Soil is loamy, so the root zone is staying wet. Always when using soil find the best u can find, ensure it has a high porosity index meaning it drains well. Also water/ feed less at this stage of life, they don’t require too much. Let the soil dry for few days to week. Top 4” should be dry before u water, and only water like a cup to the outside edges not at base of plant. She will recover, just give it time