Alert return in OK state when condition is still false

i’ve migrated from grafana 7 to grafana 10 thx to the “grafana auto migration” and i have some issue with alerts.
For example, this alert, which is triggered if the value is 1, returns to the “ok” state even though the value in the query is still 1, and so creates a new alert.
I have more than 1500 alerts set up and I’d like to understand this behaviour to prevent it.

the state of the alertis ok now but we can see the value is still 1

Pls check/show “Show state history”. It may not be alerting, because value:

oh yes i seems to have some issue

as there are not more “Keep last state” option on alert i think i still have to do many change