I'm not certain here, is the plus 100 production only for colony bases? I see that it applies to star bases as well
It was a bug. Leaders with the Trailblazer skill were being allowed to provide production bonuses to all building types being constructed and not just to colony bases. I've just pushed a hotfix for this update on Steam to correct this. Humble and Itch.io updates will follow as soon as possible. Thanks.