Persistent annoying voicemail notification

On latest iodéOS 5.5 on my Fairphone 3+, when I get a voicemail it’s impossible to remove the notification. I get the icon at the top, the blue notification LED flashes and it makes a noise every few seconds, even when I’ve tapped on the notification and listened to the voicemail.

I’ve found a way to disable the noise for voicemails but I don’t want to disable voicemail notifications entirely, I just want them to go away as they should do. If I swipe the notification away it comes back again a few moments later.

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