Hi people. This is my first post and I would appreicatze your help in deducing a possible form issue that I may have.

My back is neutral save for a 'wave'/ slight curvature around my lower thoracic to lumbar area. This is slightly apparent at lower weights and more prominent at higher weights. I feel no pain but visually it seems incorrect. Any ideas?

Could it simply be my erectors being big (comparatively) and thus sticking out?
Trust when I say I've a lot of form cues but any help is appreciated.