Position Sticky is not sticky

Okay so here’s i attached the screenshot

I don’t know whether this is a bug or not(?) but anyway this annoying me, the 2 other were stay in place while this isn’t

The step to reproduce is easy

1. Create the parent frame and set overflow to vertical
2. Inside the parent frame add 3 children that and set the overflow to horizontal (1 of 3) and leave the rest with no scrolling
3. Inside all the children frame, add one sub-children named anything (mine is header and row), once set then change the header position to sticky
4. View on prototype and there you go

Any solution?