Continuation type Line continually resets to None

Seems I cannot make any changes to Playing Techniques without having nearly all of the Continuation Type → Line being reset back to None whilst I keep setting it back to Line. What’s going on?

I’m sorry, I’m not quite sure what you’re reporting here. Can you give me a step-by-step description of what you’re doing in Library > Playing Techniques so I can follow along and see if I can reproduce the problem you’re experiencing?