This plugin does not work with cache plugins. Any ideas how to fix?

Really a shame there is no more dev support, because this is such a wonderful plugin.

This plugin does not work well when using some of the popular cache plugins like WP Fastest Cache for example. With cache plugin, the vote is recorded and it shows user the results after voting. But the next browser session user visits the site, it shows the vote button again to the same user IP, etc. If user tries to vote, it triggers an error “blocked already voted”.

The plugin is supposed to remember the user IP/cookie so that this does not happen, but something goes wrong when using cache plugin. One workaround is to set the polls re-vote option enabled, but that’s not ideal. We want returning users to see the results for any polls they’ve already voted on without having to vote again or clicking the “results” link.

Any ideas for a fix would be very much appreciated! ??