preview post gives 400 bad request error

Hello

I have install your plugin and works great for me however when I publish a custom post on schedule and want to see the preview the link take mes to the preview part but game me 400 Bad Request, is there any option where I can fix this??

this is the link – https://everson.org/explore/%status_exhibitions%/faceted-wrap-by-derek-porter/?preview=true

as you can see the status_exhibitions is the custom post

if i use the same link with 25 it works well

https://everson.org/explore/%25status_exhibitions%25/faceted-wrap-by-derek-porter/?preview=true

thanks in advanced
wally

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