v2.1.2 (b 565) minor bug; deleting HTP list while active continues to output?

Hello, Today I had a HTP Cue List up/outputting on a previous page (Page Change Action: Leave In Background) when I deleted the cue list channels remained at that level. Pig Release had no effect (as you might expect with a HTP).
I was able to adjust output in programmer but clear restored to the old cue... storing channels in a new list cleared the problem.

I would expect channels to default to zero if you delete their list; anyone else seen this behaviour?

Thanks!