I've created a new improvement which works but the recommendation popup gets mixed up between this and other improvements. Is this a bug or am I missing something? I've only changed the database, no lua or anything else. xml attached. The Improvement_Yield addition was just to see if it made a difference - it doesn't. TECH_MYSTICISM as the build prereq is a custom tech defined elsewhere (and working fine). There are no errors reported in log files.
Any ideas appreciated, thanks!
Any ideas appreciated, thanks!