Why is my material having strange rendering problem？

Development Rendering
,
1

material

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image1663×949 66.9 KB

in the world
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image795×564 51.1 KB

Please help
me, I changed three computers and used several unreal versions, all of which have this problem
T.T

2

ue5.1 is normal

4

image
image290×432 11.5 KB

it has two grids!

5

AAAAAAAAAA！What kind of weird bug is this? when I create float 3 to link to WPO, everything is OK!!

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image1386×603 46 KB

YOU CAN NOT SET WPO VALUE DIRECTLY!