I'm having a weird problem.
If I put a post grid inside of a post, it seems to crash the website. Pages seem to be fine though.
When I click update after putting the shortcode in, it tells me "Updating Failed" after it tries for a little bit.
And then certain pages give me a 503 Service Temporarily Unavailable message.
If I disable the plugin and re-enable it, or I delete the post grid I just created, then it works fine.