Yes tie the back down but do it over a few hours. Bend from the top, when it gets soft, put a tie in the middle then move to the top and tie it back down. Some bend easier than others. If it cracks don't worry just tape it firmly with electric tape. This turned into this with bottom branch colas even with the top. At some point in flowering (3weeks) I cut the ties and let it go. It's easier to manage and the plant was never topped.