The new feature to refresh blueprints by force placing (shift-click) doesn't seem to be refreshing concrete. The blueprint I am using has both normal buildings (turrets, power poles, etc.) and concrete underneath.
The non-concrete things in the blueprint refresh correctly however.
[0.12.0] Concrete blueprint doesn't refresh
Re: [0.12.0] Concrete blueprint doesn't refresh
Thanks for the report. This is now fixed for 0.12.1.
If you want to get ahold of me I'm almost always on Discord.