BigBlueButton v2.3 uses an instance prefix while generating padIds. Closed
captions was missing this information when updating pad's content for dictation
mode.
When managing Etherpad's pads, Meteor makes API calls to initiate the closed captions
and shared notes modules. The pad id was being mapped to a shorter id than the meeting
id because of a Etherpad lenght limitation.
Changed to something less guessable.