thanos differences between alert aggregation

[LukaszSz]

Hi Prometheus community,

I noticed strange behavior in my Thanos. When I want to make a list of specific alerts using promql I get proper number of alerts:

but when I want to list the same thing under Status --> Alerts then Thanos doesn't aggregate it and shows me the alerts only from one datacenter. After few refreshes it shows me the alerts from other datacenter but never from all dc:

Guys, do you have any idea why it happen like this? Is it normal behavior or something which should be fixed somehow ?

Thank you