Camera not updating to version 4.6.6

Hi I have owned the eufy 2cameras, doorbell and base unit for about 2 weeks now and purchased one more camera the other day which is a newer version 2 the problem is my original eufy cameras do not automatically change to night vision even though I updated them but my new eufy version 2 does. I have to manually turn night vision of and on then they work but when I check at around 5 in the morning they have changed back to day vision making it impossible to see anything. I have updated them but it seems they will only update to 4.41 and doesn’t update any more. My newr camera does update to version 4.6.6 and works fine. Could any6help with this problem thank you