Difference in vertical parallax handling (yscaledelta)

[potsmugen]

Describe the bug

Can't believe I only just noticed this, but if you make Mountainside Temple's camera scroll all the way up, in Ikemen GO (current and 0.98.2) there will be a black bar at the top of the screen.

I think it's because the vertical parallax doesn't quite behave the same way as Mugen 1.1.

To Reproduce

1. Choose Mountainside Temple as the stage
2. Perform a double jump with KFM

Expected behavior

Same as Mugen 1.1

Screenshots / Video

Mugen 1.1:

Ikemen GO 0.99 RC1:

It's less obvious, but the floor sprite also looks different.

Engine Version (or source code date)

0.98.2 and 0.99 RC1

Operating system

Windows

Extra context or search terms

No response