Hi @A_MN ,
Thanks for sharing the XLSForm file.
I've published it (with a minor modification to remove the input mask of the first question) from 3.18 version of Survey123 Connect, with setting of Options->Images->Unrestricted to allow image larger than 1280px. Then tested with filling all image questions with a 4000px*3000px image (23 images in total), but I can upload and submit the survey successfully in both 3.18 field app and 3.18 web app.
Are there any specific steps I missed to reproduce the issue? Or if possible, can you please share a screen recording that shows how to reproduce the error?