When disabling shared notes from the BBB plugin, the setting is not correctly passed to the meeting. This is because of a misspelling on line 374 of mod/bigbluebuttonbn/classes/meeting.php 

'disablenote' => 'lockSettingsDisableNote',

According to BBB API documentation, it's actually supposed to be lockSettingsDisableNotes so the code is missing an s at the end.

Steps to replicate:

1. Create a BBB activity and enrol a student S1
2. In Activity settings under the Lock Settings category, enable 'Disable shared notes'
3. Join the session as student S1, student will still have access to shared notes