Adsense code slow to load, also causing slider issues

Been having issues with adsense ads slowing up my blog page in the last couple of weeks. I use your plugin for sidebar ads. Sometimes a page will load and no ads will show, and at other times, it seems to conflict with my featured posts slider (I use wootemes canvas)?

On previous versions I had mfunc enabled as I use W3 cache. I tried using direct mode as an experiment and it seemed to slow it down more, but when I reenabled mfunc it still drags. I don’t know if this is something new with Adsense code, or an isolated wordpress issue but just wanted to check and see if there’s anything else I should be doing, or other settings I should be changing on this plugin.

Thanks!

https://www.ads-software.com/plugins/ad-injection/