About the WP Smush Pro plugin

Hello,

Almost every day it said that I have images that "need smushing".
I do and it says " All images are smushed and up to date. Awesome!" ,
and again, the next day it says the same.
I don't know if it's something that I need to do every day or the plugin just smush one amount of pictures at time. Is there something that I'm doing wrong?
I would really appreciate your help here.

Thanks!
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