Thanks for the answer!
I already tried to reconnect my Instagram account and no change still the same post that are displayed.
The error log says “All systems operational! The error log is empty.”
Since I tried with another insta feed plugin and the result is the same, I would say it is not a specific plugin issue but maybe how the feed is send from insta, maybe there is some specific options that I need to activate, or maybe since it is at a precise date some parameters that changed. Hoping since you probably are more versed than me into how those all insta feed operate you can direct me towards a beginning of solution.