Panel OnDismiss is called twice

[dcowen91]

Environment Information

• Package version(s): Latest (6.165.1)
• Browser and OS versions: Chrome 73, Windows 10

Please provide a reproduction of the bug in a codepen:

https://codepen.io/anon/pen/vMmoJR?&editable=true

Actual behavior:

When closing a panel, the onDismiss function is called twice. Once before dismissing and once after.

Expected behavior:

OnDismiss is only called once.

Priorities and help requested:

Are you willing to submit a PR to fix? No
Requested priority: Normal

[joschect]

@dcowen91 Thanks for submitting this issue and for including the codepen! This looks like it's a problem, I'll dig into a bit more and see if I can figure out why!

[msft-github-bot]

🎉This issue was addressed in #8710, which has now been successfully released as office-ui-fabric-react@v6.167.0.:tada:

Handy links:

• Release Notes
• Official NPM Release
• Test the release with Developer Demo Site