Inconistent values in singelstat panel for last value

I’ve observed that the singlestat panel is showing different values for a prometheus metric if the instant switch is set compared to the selection that the “last (not null)” value should be shown. As the instant query is using another api endpoint I would guess the reason must be something related to the interval and data point aggregation that is happening otherwise. I would be really happy if someone could proof that right or tell me the right reason. Seems like a bug for me.