Have there been changes in image compression recently?

Thank you, I will try.
I had it set to 97, I had thought that recompress was only activated when the image exceeded image thresholds.

I have configured composer media parameters like this (I don’t fully understand the meaning of all of them):

image bytes optimization threshold: 1259520 (a bit more than 1,2 MB).
image resize dimensions: 2000
image resize width target: 1920
optimization image encode quality: 97

So you say that I have to change it from 97 to 100.

But shouldn’t it be applied only when the images exceeds thresholds?

If I use 100 it won’t be able to resize the image bellow thresholds, would it?

Thank you for your help.