Image of person on snapshot but no video of event

So we have a Ring video doorbell 2, lately it seems like it does not detect my husband coming home from work (which is typically just before or at 6:00am so it’s still dark) This morning however, I saw that there is a snapshot image that captured him at the door however there was not any video of “motion detected” or “person detected” of him walking from our driveway to the door. I’ve ensured all motion alerts are on and the zones cover all the way to just before the sidewalk in front of our house. The only difference is that we just recently installed a spotlight camera above our garage so I would think that our “garage cam” would capture him pulling into the driveway and then walking towards the front door then the doorbell camera SHOULD pick him up the rest of the way walking up to the front door but it does not. Not sure if that has anything to do with it but the video doorbell was working fine before and had captured video of him walking in. I also do NOT have the devices “linked” in the app, meaning if the garage cam senses motion then the doorbell does NOT automatically begins to record. I didn’t think that would be necessary as I explained that I “thought” the video doorbell would pick up where the garage cam left off based on their position and when motion is detected. Am I wrong? Any help would be appreciated. Both doorbell and spotlight cam are battery. I have also tested this myself, but of course when I walk out, wait and walk back up the door it detects me just fine. ?