App Intents that Start a Live Activity fail IF a Live Activity is already running.

is this a deliberate limitation or a bug?

my app Timely, is all about using Live Activity Countdowns (to show time remaining before an event at a glance)

the app has a particular focus on Shortcuts (app intents) support

as part of this, you can use Siri to Start a countdown, either by calling the Intent directly with something like 'Hey Siri, Start a Countdown in Timely'

or by running a shortcut via voice that uses the provided Shortcuts actions (i.e. Bagel Timer)

Here's where im hitting a limit or a bug and I cant figure out which (leaning towards bug)

if no live activity is already running, these siri/voice interactions work just fine

but if a live activity (from my app) is already running), then reliably, Siri will say 'Something went wrong, please try again' and no live activity will be started

have you come across this before? is this a bug or a documented limit?