[Facebook] Page Event Co-host loosing event permissions

Root cause -

In mobile flow when the Co-Host goes to the Event to add another Co-Host, he has to choose "Edit" Event option. In the Co-Host option he gets to search Pages and People to add. In this flow he chooses a Co-Host and saves the settings. This was flow removing him and adding a new Co-Host.

Timeline -

Reported - Sunday, March 31, 2019

Triaged - Monday, June 3, 2019

Fixed - Friday, October 11, 2019

Rewarded - Tuesday, October 29, 2019

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