When checking code to change in #44164 I noticed that savegame loading converts "Experimental" AI level to "Hard" for non-debug builds only for individual players. The global skill level setting has no such conversion, but will fallback to handling of illegal AI level, and get converted to hardcoded default AI level (Easy). Assuming #44164 gets accepted in the form I plan to implement it, the more universal AI level conversion it provides will resolve this issue automatically for branches where it goes (master, and presumably S3_1). S3_0 needs a separate fix. (#44164 depends on #44100, so I don't think porting it is an option)
When checking code to change in #44164 I noticed that savegame loading converts "Experimental" AI level to "Hard" for non-debug builds only for individual players. The global skill level setting has no such conversion, but will fallback to handling of illegal AI level, and get converted to hardcoded default AI level (Easy). Assuming #44164 gets accepted in the form I plan to implement it, the more universal AI level conversion it provides will resolve this issue automatically for branches where it goes (master, and presumably S3_1). S3_0 needs a separate fix. (#44164 depends on #44100, so I don't think porting it is an option)