Scheduled posts missed

This is my blog URL
http://essexonlakechamplain.com/

i installed this plugin 3-4 weeks ago to improve my site performance and it really works very well.

But now my scheduled post are not getting published i need to manully hit publish then my posts are getting published.
before 1 month it was working properly but after installing this plugin my schedule post are not working properly.

What is reason behind this ??

Thanks,
Parimal

https://wordpress.org/plugins/w3-total-cache/