Steps to Reproduce

1. Create a multiline TextField and fill it with more text than it can fit vertically, so that it allows scrolling.
2. Long press to open the text selection menu.
3. Scroll the field a bit.
4. The menu should fade out during scrolling and then fade back in, but it doesn't!

Here is native Android and Flutter side by side (native iOS does the same thing as native Android).

Native Android	Flutter targeting Android