ρCam does nothing but save new pictures in jpg and dng format in MyDocs/DCIM (no API calls or anything, it would be the same if you just copied a picture there yourself)

It is possible that the existence of dng images in DCIM breaks something. If disabling DNG save from settings solves the problem then I can change the location that the DNG files are being saved

On the other hand the breakage might occur every time a big file is written and tracker tries to read it and create a preview.