WEBP delivery not working when object cache is enabled

Hi. I use Shortpixel to generate WEBP images and LiteSpeed Cache to deliver them in front-end (I configured it with this tutorial: https://help.shortpixel.com/article/264-how-to-deliver-the-webps-generated-with-shortpixel-with-the-litespeed-cache-plugin). Everything used to work great until I enabled Object Cache (Redis) in LiteSpeed Cache. Shortpixel still generates WEBP images, but LS Cache stopped delivering them in front-end. Any ideas how can I fix it? Of course when I disable Object Cache all starts working as it should again.

Report number: IHQEFZEF

Thanks,
Kacper