Still dying

It's possible that the leaf burns on your plant are the result of nutrient excess rather than a pest infestation. However, it's important to consider that the leaves at the first node are usually the first to drop over time. If the new shoots appear healthy and show no signs of damage, it's a positive indication that your plant is on the right track. As the plant grows, it's normal for older leaves to die off and be replaced by new, healthy leaves. Remember to monitor nutrient levels and ensure you follow the recommended fertilization guidelines to avoid nutrient excess. Pay attention to any changes in leaf appearance and adjust your feeding practices accordingly. I hope this information is helpful! If you have any further questions, feel free to ask. Best wishes and good luck with your plant!