Main thread hanging when starting / ending a session

[vpredas]

SDK Version: 2.4.8 / 3.1.3

Steps to reproduce:

1. Use Asleep SDK sample app: https://github.com/asleep-ai/asleep-sdk-ios-sampleapp-public
2. Open the project in Xcode
3. Open Instruments (CMD+I)
4. Select Time Profiler
5. Start recording from the Time Profiler
6. Start / End a session multiple times, until you get a hang

Other details:

• the hang takes always like 2.6 seconds
• tested with 2.4.8 and 3.1.3 and I get the same results

stack_trace_blocking_main_thread.txt