[WP Smush Pro] Nasty memory spikes on his server as soon as Smush CDN is active

We let Smush CDN run for 24 hours, but regular spikes like this did not abate during that time. As soon as we deactivate Smush CDN, the spikes disappear.

https://cdn.livechat-static.com/api/file/v2/lc/att-old/8801096/38131886e70197e6effcd64cead3153d/RAM03.JPG

Less than 150 images in the media library.