I implemented the Share to Facebook functionality introduced in a recent version of the Platform SDK and it has a couple of issues when you supply a long text.
First, the share dialog in Oculus home cuts off the text when it is too long, I was hoping for multi-line/text wrap support here. More importantly, when I clicked the text for editing and tried to close the keyboard with the close button on the lower right, it crashed Oculus Home a couple of times. Unfortunately, I was unable to reproduce it after it happened a couple of times, I was also not able to recover any logs.
Here's some information: Game engine: Unreal Engine 4.17.1 (source version, customized) Platform SDK: 1.20 (integrated myself)