[bug] weird knee deform kkbp armature and rigify problems

[multitrack-collector]

Hi I'm using Blender 3.6 and mmd tools version 2.8.1, I also use KKBP 3.5 because with newer versions, some textures don't import properly.

Anyways, my problem is that when I import a character into Blender, the kkbp armature causes the character's knees to deform incorrectly by shrinking more than they should. Here's a link to a video that shows what's happening I believe I saw a similar issue with newer versions as well.

Though the rigify armature doesn't have this issue, moving the ik hand or foot bone results in the link being over stretched. Here's a video that demonstrates this.

Is there a way to fix this?

Thanks!

Here's the card I used in all videos.