These newer Apple iPhone models may occasionally display jittery video when used with the SlingStudio Capture app:
The issue is intermittent, and seems to happen from that start of streaming. It doesn't tend to happen midway through a streaming session.
It may be more noticeable if you choose higher bit rate settings for your production in the SlingStudio Console app. If you can, consider lowering your project's bit rate settings to see if that helps.
Quitting the SlingStudio Capture app and restarting it does not seem to help.
We are currently investigating a resolution.