Steps:
1. Open attached project
2. Build and run "Realible" scene for standalone
3. Run "Reliable" scene in Editor and press "Server" button
4. Click "connect" button in standalone
5. Click "Realible" button in standalone
==>
Client starts to send messages via 5 Realible channels in one update

6. Run clumsy with 5% (or more) packet drop
7. Wait
==>
After some time (~300-400 messages or earlier) the "Assertion failed on expression: 'm_MessageLength == m_TotalLength'" assertion appears

You can change the amount of channels in:
"Assets->Scripts->Unity-> UnityFactory.cs"
variable is "maxChannelAmount"