What does this PR do?

Where should the reviewer start?

DropContainer.js
DropButton.js

What testing has been done on this PR?

storybook

How should this be manually tested?

      <Box margin={{ left: 'large', top: '200px' }} direction="row">
        <DropButton
          badge={badge}
          dropAlign={{ left: 'left', top: 'bottom' }}
          label='hello'
          icon={<Columns />}
          dropContent={
            <Box pad="medium">
              <Button
                label="Toggle badge"
                onClick={() => setBadge((prev) => !prev)}
              />
            </Box>
          }
        />
      </Box>

Do Jest tests follow these best practices?

• screen is used for querying.
• The correct query is used. (Refer to this list of queries)
• userEvent is used in place of fireEvent.
• asFragment() is used for snapshot testing.

Any background context you want to provide?

Re-rendering the Button when adding a badge or tip causes the DropButton's buttonRef.current to change. DropButton passes the initial buttonRef.current to DropContainer but doesn't pass the new one when the Button re-renders for the badge.

more comments here

What are the relevant issues?

closes #6539

Screenshots (if appropriate)

Do the grommet docs need to be updated?

no

Should this PR be mentioned in the release notes?

yes

Is this change backwards compatible or is it a breaking change?

backwards compatible