[Smush Pro] Unexpected SERP drops and image crawl errors on GSC – want to drop Smush pro

Hi there! I recently joined up for the free trial to see if the smushing would speed up my site’s images and increase my rankings. Unfortch, I would not actually pay for the full price product going forward as I don’t have the budget. However, it’s caused some still unresolved crawl errors and huge SERP drops for some key revenue-driving posts, that’s it’s important for me to re-rank. As I mentioned, there is no budget to carry on a subscription past Jan 27 when my trial ends, but due to the issues I actually want to end the Smush Pro trial sooner than that. I wanted to ask a question first – and that is, that if I stop the Smush trial, will all my images still ‘work’ ok and appear fine in my blog posts? I’ve thousands of images and don’t want to risk causing a calamitous issue that I Can’t afford to fix. I saw somewhere that they are located on a CDN, which obviously I would want them located back on my WordPress server now. I want to make sure I safely deactivate the plug in, but will probably go on using the Smush free version after I pull the plug on the free trial of the paid version. Thanks