Those might be flatpak “refreshes”, which show up as “updating to the same version”. As described by a flatpak maintainer, sometimes an app or runtime gets updated without changing the user-facing version number. I assume that’s what you’re seeing here.
The screenshot doesn’t show any version change to signal - the version number is the same, so I was just answering why you might see an update like that since I thought that was part of your question.