Hi Daniel,
May I know if your photo is using High Efficiency (HEIF/HEVC) format? Currently this format is not fully supported in current version of Native EasySocial App as there is no dedicated image processing within the app yet. You can check the format by going to your iPhone settings > camera > Formats.
If you are not using the format mentioned above, kindly provide us with the image that you are trying to upload here so we can try it out directly.
Please advise.