Would it bother you if your s.o was saving voicemails from their ex?

My s.o. had a voicemail to play for me, and we had to cycle through old ones and came across two from the ex. It didn’t bother me initially, but it was the body language that bothered me. Some of the other ones were in debate: “should I delete it, in not sure….ok I guess I’ll delete it” but when it came to the voicemails from the ex it was like: “yes, definitely gonna keep those”. Would that bother you?