Build Project taking up to 5 minutes for 3/4 objects?

Hello guys. Is it only for me or do you are experiencing problems with the project building times?
Every time I have to build (in order to test if the project folder works fine) I have to wait 5+ minutes. Last time it was all done in like 3 seconds. Thanks.

The more you add the longer it takes, i’ve seen some take 40 minutes now. But they are in-depth airports.
3/4 objects should still be seconds, unless you have done some copy pasting in blender after adding materials, say to a fence post and now have several thousand materials?
How’s the poly count?
What errors are showing in the console if any?
Texture sizes?

Yes, it takes very long for mine quite small airports as well, it’s getting worse after each sim update

If have started to use the packagetool in the SDK, just drag the html file on the packagetool then it does all quite faster