When trying to use a blueprint inside i always get the message "Cannot build in an uncharted area".

I figured that also Factorissimo had the same problem cause users got the same message.

But all have/had in common that it happens/happened during "on_build_event" activities

Somehow the developers of Factorissimo got this issue fixed, while about 5 months ago a workaround was posted for them here https://mods.factorio.com/mod/Factorissimo2/discussion/603748eef4814b59ae91d2d8

i tried to add similar code to Integrated Circuitry but was not yet successfull to get it to work. Something has changed handling surfaces by default like described in the link above.

If someone has any suggestions or is willing to help i would appreciate it, since i think this is a very helpful mod if it is working as designed.
If we got a working fix for all issues we may create an official fork.