I play in post release 6.2 and noticed an issue on landmark or marbe archivement.
1) on my 1st city i was able to unblock the 2 first landmark. I completed next missions (260k people) but landmark didn't unblok not next mission)
2) on the 3 other cities that i created archivements are validated but next mission don't apears, and landmark don't unblock (more than 60k people in a city ...)
I don't remerber to have this issue on standard game version

Thanks