Hello, :)
I had the same problem with the large images with 5.2.8. Since version 5.2.9 the images are back to normal.
I wanted to use the new Image Shape features, which works great, but unfortunately it only shows up normally in the SP Builder in the preview or on the website. Only the image shape settings are not adopted, the effect settings are.
Joomla v. 4.3.3 - SP PageBuilder v. 5.2.9 --- Firefox 123.0.1 (64-Bit)
Thank you for your time.