Invalid state error when updating key session with "com.microsoft.playready.recommendation"

[dsilhavy]

Description

Based on the discussion we had here: #3869 the plan was to move to com.microsoft.pleayready.recommendation as the default key system string for Playready. While doing some regression tests I ran into situations in which updating the key session resulted in an Invalid state error. This does not happen with com.microsoft.playready.

Investigate what causes these issue, maybe changes to our ProtectionModel are required.

For release 4.3.0 we moved back to com.microsoft.playready as the default system.

[dsilhavy]

See comment here: #3869 (comment)