Since I deleted this plugin, it has caused so much woe. My recent posts widget has stopped showing thumbnails in the incognito mode. And as i can see in the inspect mode, speed booster is still running lazy loads for these images.
I’m sorry you had trouble @shreyaam! Speed Booster Pack (like most performance optimization plugins) needs meticulous configuration but there are also parts incompatible with some setups. We’re working on a major update which would resolve a lot of conflicts.
In response to your question about lazy load keeping working: Some hosting companies employ their own server-level caching mechanisms that (sometimes) need manual flushing. Since all WordPress plugins stop working when they’re deactivated, I can confidently say that there has to be a separate caching layer and when you flush it, your issue will be fixed.
Like I said, @shreyaam, WordPress plugins stop working when they’re deactivated, so there has to be a separate caching layer. If you have Cloudflare or Sucuri as a proxy server, that could also cause this issue.
Maybe to trigger a cache flush, you can delete the widget and add it again.