Scrolling Frame not working while parent is not ScreenGUI

When I try to parent a scrolling frame under a frame, The scrollbar disappears. Here’s a video.
for some reason the video recording software glitched, so imagine my mouse being more to the left.
I really need a fix for this, and I can’t find any answers.

How does it appear in game/play solo mode?

When I try to run the game, the scrolling frame looks exactly like it does while editing.

I tried replicating the problem but it did not seem to want to not work.