Hi Igor,
Thank you very much for your report.
Can you provide a link so that I can verify the problem? In my test environment, I can’t reproduce it using EWWW Image Optimizer for webp.
Which plugin do you use for the webp images?
Possibly there can be problems with background-images, so for example EWWW provides two options in this regard that can help. However, in my case, it is not necessary to activate them.
Issue #2 has already been reported here: WIP: Icon element shrinks / looses style using a link and styling on ID - #2 by BerntK
Best regards,
timmse