I wonder anyone experienced the same issue as mine, that the places visited in Timeline keep losing.
I checked the count at Timeline (https://www.google.com/maps/timeline?pb), and it decreasing from time to time.
I also checked the monthly Timeline email that the count is decreasing too.
Tired to report this in app, but reporting in Timeline tab is not really support in there, and I can only do so here.
Not much concern about the count number, but I believe some of my visited places in my Timeline is gone too. (Although I will not able to check day by day)