Hi, I noticed that you have set Image downscale factor in your alignment setting to 2. Can you change it to 1? Also, you can try to increase the max features per mpx to 30 000, max features per image to 60 000 and preselector features to 30 000.
Also, what could help here is using some CPs placed behind/around the model, which could be used in the alignment process and also for scaling.