Hey, welcome back to the forum!
I’m not sure, I have had this happen sometime. I recommend using an Ethernet wired connection to the base if you can, if not make sure it’s close to the router. You could have an underpowered router, and it’s getting overloaded with all the cams and kicking the base off the network sometimes. You may want to look into a new one depending on how old and how good of a router you currently have.
The events will only be in the events tab of the app for 14 days. Once you share the event (like emailing it) it becomes stored elsewhere (email servers) and is no longer attached to Wyze. It will be in your email forever until the email is deleted, or if you have autodelete enabled.
Alternatively you can put an sd card in the BASE station, and it will auto save events to that card. Unfortunately you cannot view them in the app, you need to remove the sd card and view them on a computer. This also does not work if you have cam plus. It will work on cam plus lite.
The sd card in the cam itself is only for Timelapse’s and scheduled recording.
I’m not entirely sure what you mean by this question, but if you enable person detection on the event recording settings, it will add a person tag to the events. You can the filter events in the events tab by person or other tags. Note that cam plus lite is required for person tags and cam plus is required for others.