BUG?: building priority is not always respected

When you set the building priority to be higher than default P8 (tried P1/P2),
other sites will still get materials first anyway if the amount required for the specific material is lower than the P8 construction needs.
(There might be a distance thing too. But the problem I noticed was related to the amount.)
This sometimes renders the prioritization useless and you have to revert to pausing the lower prio sites.
Not the biggest issue, but seems to go against what you intended with the building priority mechanic.
PS:
I'm not talking about the delay it takes internally to finish the current jobs before refreshing/sorting/creating the ToDo stack anew).
This problem persists over minutes after there was plenty of time (or finished jobs) to reach a point where everything _should_ be done by priority.
Otherwise, awesome and unique factory builder.
Also proper use of early access. On some other games the current state of this would be 2.0 :)
regards,
Julian

most obviously is pipes always built before anything else