Plugin performing slowly

For some reason this plugin has suddenly started slowing down my site in general, and the plugin itself is especially slow to load posts. I haven’t had any trouble with it before, nor have I changed anything recently. Could this be a small conflict with the latest iteration of WP? Would be interested to hear if anyone else has found this, and whether they’ve figured out a solution.

Thanks

https://www.ads-software.com/plugins/ajax-load-more/