Base Timeline resumes when layer closes in HTML5

We have a custom CC Text button on stage that toggles a layer. It will show at the beginning of the slide if the variable cc_on == true. This same trigger is applied to all secondary layers as well. Some of our slides pause the base timeline to wait for a user interaction. The CC layer settings are all unchecked. "Allow seeking" is "Auto" and "When revisiting" is "Auto."

If the base timeline is paused and the CC is open and the user closes the CC, the base timeline resumes automatically.

Is this another HTML5 bug or is there anything we can do? We have 15 courses already developed and just now discovered this issue.

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