On an Android phone.
The following happened twice recently. The first time I thought I may have done something wrong. The second time I was very careful and it happened again. The second time:
The first person drops off a package. I can see the event notification and tap on it to play the video.
Later another person drops off a package. I see the event notification and tap on it to play the video. But then when I go to the Eufy app, Events, only the first event is shown. The second one is not shown.
There doesn’t seem to be any way for me to recover it.