It might be useful to know how you are using SSL.
Do you use AsyncHttp (legacy), Network (current), or do you use the he openSSL extension?
Are you certain it is an SSL problem? Can you set-up a test server that does not use SSL? Are you certain it is related to iOS 8.3? Can you demonstrate that the problem does not exist with an older iOS?
I'm sure it's SSL related, as turning off SSL allows the app to connect. I'm using Network (current), but also tried with AsyncHttp (legacy) and had the same result. All used to work on the test device prior to the iOS 8.3 update.