Official Release Notes

• This Valentine's Day, we have good news if you're planning on getting back together with your iPad after taking a break: A bug that could cause Signal to crash when attempting to re-link an unlinked device has been fixed.
• If you're in a relationship with multiple devices, group call notifications on your iPhone will be automatically dismissed when you answer that call on your iPad or Desktop.

Upcoming Features

• More work done on calls tab [src]
• More work done on usernames [src]
• CDN3 upload support is in internal testing [src]