ClearUrl breaks dafont.com's search feature

[amplifythought]

Hello. I sometimes download fonts from dafont.com. I can load the website fine, and load most of its pages fine. But if I try to use their search/filter function with ClearURL enabled, then I get a 403 forbidden error when changing any filter settings or searching for anything.

For example, if I go to the New Fonts section, it loads fine. URL: https://www.dafont.com/new.php

But if I change the dropdown menu from 25 to 50 to view more fonts and click Submit, I get the 403 Forbidden error. (This goes for changing any filter setting).

The url when changing the 25 to 50 with ClearURL disabled or in a different browser without ClearlURL is https://www.dafont.com/new.php?fpp=50 and works.

The url when changing the 25 to 50 with ClearURL enabled is https://www.dafont.com/change_display.php?fpp=50 and leads to a 403 Forbidden error and says "You don't have permission to access this resource."

I have no idea why this would break. This is the only website having the issue, or at least the only website I've noticed having the issue. I see on this forum that there are other issues with webpages breaking on specific characters, but this url doesn't have a hash. It does have a question mark, but the question mark seems to be intact still? Any ideas why this is breaking and how to fix it? Otherwise I guess I can just disable the extension whenever I got o dafont. (At least until a whitelist feature is created.)