At first blush, that feels like this for Cam v4:
In that topic, I was able to reproduce the Alexa person detection routine issue for Cam v4, but I can create a new Alexa person detection routine for Cam OG and get that to work. One funky difference that I’m seeing between those is that the settings page for Cam v4 in the Alexa app has a Person Detection Announcements toggle and Cam OG has a Person Detection Notifications toggle. I don’t know if this feature/function difference has anything to do with the way Alexa routines behave now, but it’s one of the things I noticed while trying to test this. I don’t have any Cam v3 Pros to test.
Don’t be so quick to replace them with Cam v4s. You may want to take a look at that topic first, and note that the initial post in that one links to an older occurrence of what seems like the same issue.
I’m really not sure where to point the finger for this one. It feels like maybe Amazon made a change to Alexa that broke this and Wyze hasn’t done whatever they can to compensate for this change on their end (especially considering that this still seems to work for Cam OG), but I’m just guessing about that. 