I am observing different behaviours of the plugin when triggering the build manually and when the build is triggered by the timer. The field is configured this way:

• Parameter type: check boxes
• Delimiter: (a space)
• Source for Value: Value = -p,-t,-v
• Default Value: Value = -p, -t

• If I run a build manually (leaving the defaults) to print the value of the variable which holds the param the output is:

  + echo -p -t
  -p -t
  

• If I the build runs with a timer the output is:

  + echo -p, -t
  -p, -t
  

I've tried the following configuration, which works as expected, however, the default options are not marked when clicking Build with parameters

• Parameter type: check boxes
• Delimiter: (a space)
• Source for Value: Value = -p,-t,-v
• Default Value: Value = -p -t