[Hummingbird Pro] Hummingbird Pro + Smush

Hi
I am experiencing an error wherein my header images on blog posts, as well as thumbnails on my blog archive are being displayed at incredibly low resolution. By clearing the cache via the Hummingbird Pro dashboard this error is temporarily resolved., but manifests again with a few days. Furthermore, the social icons desiplyed in my navigation bar are continually not displaying, and instead squares are displayed where the icons should be. This issue resolves if I deactivate your plugins.

Please could you provide some guidance or assiatnce.
Thanks