In Krita 3.0, when I unlink horizontal and vertical blur when using the blur filter and set the horizontal blur to zero, the program crashes. I can set the vertical blur to zero without any problems. Do you guys know why this happens? Thanks!

Edit: The program also crashed when the horizontal blur was set to one and the vertical blur was set to ten.

And this is still present in ver 4.2.8

Has the crash been reported to the devs tho?

It was reported today: https://bugs.kde.org/show_bug.cgi?id=416241

Yep, that was me

Thanks for confirming the issue.