P: Unnecessary disk activity (NAS)

I have the images taken in 2025 on my laptop and I have all my other images off on a NAS.  I've been updating and fixing such things as Country recently which involved changing the metadata value of many thousands of images at the same time.  It was going rather slow and I also noticed that my NAS was being accessed so I did a few quick experiments.  (For reference, this is LrC 15.0.1, macOS 26, M1 Max MBP).

With the remote NAS mounted, changing the state from Texas to TX of 48517 images took 3 hours.  With the NAS unmounted, changing the country from blank to Banana on 30101 images took about one minute.  The later is what I would expect.

I believe I've mentioned this before but perhaps not in this forum.  I can't recall.  But this is a serious error.  The whole point of LrC for me is the database and being able to quickly find and manipulate metadata associated with the images.  I don't know how to open a bug report but I definitely feel like this is a bug that needs to be fixed.

Edit: Automatically write changes into XMP in Catalog Settings is off