Lightroom auto settings not being applied to all selected photos.

I've also got this issue, in 2025 on v14.4. Been happening a lot, seemingly can only apply auto settings to some pictures. I've got around 100 pictures in this current batch and after around 20 pictures the sliders in the "basic" slider panel are all reset to 0. However the colour grade and total exposure settings have applied to the whole batch - just not the basic sliders panel.

I could easily be wrong. Other members will correct me if so. But as I recall, and as I have noticed, The Auto Tone in the Develop Module, unlike the quick Auto Tone in the Library Module, does not apply individual photo adjustments in bulk/batch. You select multiple photos, you naturally have one of those photos as most selected, you click on that Auto Tone button, and it adjusts all those photos as if they had the same tonality of that most selected photo, Oh the sliders may show some difference, but that difference will not be based on each individual photo, but will be in proportion to the most selected.

Now if you try this in the Library Module, you will find that it works their (although a smaller set of sliders)

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I do have a reccomended workflow change. A plug-in to accomplish the Auto Tone. This one is found in the Jeffrey Frieda's Blog, for Lightroom Plug-ins, A plug-in called Jeffrey’s “Bag-o-Goodies” and specifically a tool in that plug-in called Personalized Auto Tone. I find that it does work in batch. I like it as I can limit what sliders get modified and by how much (limit) So for example I could just mod brightness, white, and blacks and avoid auto contrast, etc. 

If you buy it (not expensive, donations are, and trial for six weeks) read the instructions as initially setting it up is tricky.

http://regex.info/blog/lightroom-goodies/bag-o-goodies#personalized-auto-tone

Update after Mac tag was removed by moderator: 

This is also happening on my Macbook running Sonoma.