Suspicious number of recent 5 star reviews

Has anyone else noticed this? In the iOS App Store the Eufy Security app wasn’t rated so highly - but in a very short space of time recently there’s suddenly a huge number of almost exclusively 5 star reviews.

Not only that, the vast majority of them are just one or two sentences, very similar content, and odd looking usernames.

For an app that has had no new functionality added and still has long-standing issues (like geofencing not working…) does anyone find this sudden surge of very positive reviews a bit odd?