Same as title. The iron on the map I’ve found so far doesn’t show the number of iron available.
Use the F4 key to see what it has. If it shows 00/00 then it’s an infinite mine and needs the t4 mine building to be useable. If it shows other figures then it’s an ordinary mine and uses the t2 building.
Reloading fixes it for some reason as it now shows the proper amount.
I have seen this on previous maps as well. Often, just clicking on any non-mine building then back to the mineral node seems to resolve it as well.
Cheers
Have also had it happen that clicking F4 several times is required to get the proper amounts to show, but haven’t had that happen in 9.2c (so far)