Sab
I think this format is better served through a proper GIS application. We support SMS formats through MDAL: https://github.com/lutraconsulting/MDAL/ and QGIS uses MDAL as its mesh provider.
Yes...there is meal_translate (similar to gdal translate) utility which we have added recently. Best to move the discussion there!
@alexbruy I have created this: https://app.merginmaps.com/projects/saber/large_field_no which appears to work with a couple of changes. I think the issue was randomly surfacing so it is difficult to reproduce. @jozef-budac it...
Probably yes...I shares you the data.
Similar issue reported for the plugin: https://github.com/MerginMaps/qgis-mergin-plugin/issues/424
The work-around is to convert to layer to single part if possible. Alternatively, we need to find a sensible way of navigating to multipart features
Just to be clear, here is the screenshot of the problem in 1-n relation for multiple photos 
You can move the map when in recording mode. It will change the location to where you want and not on the GPS.
This is the desired behaviour (centre around gps) for most use cases. The app also supports moving/panning the map to the location elsewhere which is not your current GPS location....
Let's add it to the sprint and fix the issue for the next release. Many thanks for the detail bug report and the work-around.