[Popper] Fix potential issues with non-measured positioning (#541)

Author: benoitgrelard

.yarn/versions/b4dfb97b.yml

@@ -0,0 +1,11 @@
+releases:
+  "@radix-ui/popper": patch
+  "@radix-ui/react-context-menu": patch
+  "@radix-ui/react-dropdown-menu": patch
+  "@radix-ui/react-menu": patch
+  "@radix-ui/react-popover": patch
+  "@radix-ui/react-popper": patch
+  "@radix-ui/react-tooltip": patch
+
+declined:
+  - primitives

packages/core/popper/src/popper.ts

@@ -359,7 +359,7 @@ const UNMEASURED_POPPER_STYLES: CSS.Properties = {
   top: 0,
   left: 0,
   opacity: 0,
-  pointerEvents: 'none',
+  transform: 'translate3d(0, -200%, 0)',
 };
 
 const UNMEASURED_ARROW_STYLES: CSS.Properties = {