This issue has been resolved in Chalk 3.5.1 for iOS.
After updating to iOS 14 and Chalk 3.5.1, be sure to allow Chalk to connect to devices within your Local network. This allows for peer-to-peer delivery of audio, video, & images within the same network.
The current Chalk release for iOS, version 3.4, is known to experience crashes on iOS 14. The crash occurs as soon as the Local user shares their camera view. We are actively working on a fix for this issue and will update this post when it is available.
This issue has been resolved in Chalk 3.5.1 for iOS app only.