RW 1.5: Research button missing on projects with prerequisites

[YAMLcase]

For Dub's Mint Menus: in 1.5 the "Research" button is missing for research projects that have prerequisites. I went ahead and removed all other mods except the DLCs and harmony and the problem persists. Just to make sure it did indeed work and I wasn't crazy, I downgraded to 1.4 and indeed the research button is present.

1.5: research missing for all techs that have prerequisites

1.4: research button is working properly

my mod list and order:

[Rainingdayz]

same problem here.

Research DrugProduction locked but no reasons given
UnityEngine.StackTraceUtility:ExtractStackTrace ()
(wrapper dynamic-method) MonoMod.Utils.DynamicMethodDefinition:Verse.Log.Error_Patch4 (string)
Verse.Log:ErrorOnce (string,int)
DubsMintMenus.MainTabWindow_MintResearch:LockedBox (Verse.ResearchProjectDef)
DubsMintMenus.MainTabWindow_MintResearch:DrawPanel (UnityEngine.Rect)
DubsMintMenus.MainTabWindow_MintResearch:DoWindowContents (UnityEngine.Rect)
Verse.Window:InnerWindowOnGUI (int)
UnityEngine.GUI:CallWindowDelegate (UnityEngine.GUI/WindowFunction,int,int,UnityEngine.GUISkin,int,single,single,UnityEngine.GUIStyle)

[khamseen]

This bug is driving me nuts. I'd forgotten how annoying it is not being able to queue research to be done once it's prerequisites are met. I keep forgetting what I was doing the other research for.