I just installed the newest iNat update (listed as new branding update) on iPhone SE running 13.1.3. Once a photo is added from my library and observation “draft” started, if I tap my photo to view it large and then swipe down to dismiss it, the observation page disappears and I end up stuck in the camera interface with no buttons responding. The only way to get out is to close and relaunch the app. This does not happen if I take the photo via the app interface, only if it is a pre-existing photo from my library.
I can replicate this, I’ve made a bug report: https://github.com/inaturalist/INaturalistIOS/issues/542