Rftools builder area preview not disappearing

[krtyt]

Version 3.9

the light blue in world preview of the rftools builder doesn't disappear when toggle off

even on game restart it won't go away The only way to get rid of it is to go to a previous version of the save of the world

the glitch happens if you edit the shape card when the preview is still active

i remade the bug on a creative world (see picture) and you can cleary see the hightlight even though the fonction is disabled

also u can see cave kinda like an xray bug