The changes made to the values for a transform variable setup in a blueprint will not show up in a child BP until the yellow arrows is pressed to reset to default. Other variable types update automatically.
Link to possible related issue:
1. Open UE4 Editor (any project)
2. Create BP based on actor (Parent)
3. Create BP based on Parent (Child)
4. In Parent BP, add transform variable and compile
5. Change default values of transform variable
6. Check default values of transform variable inside Child BP
Head over to the existing Questions & Answers thread and let us know what's up.