Reproduction steps:
1. Download the attached project "UIToolkit Bug"
2. Build and Run the Scene "SampleScene" on a mobile device
3. Attempt to scroll the ScrollView in the middle of the Build Horizontally

Expected result: No Horizontal movement is possible
Actual result: ScrollView allows Horizontal movement

Reproducible with: 2021.2.0b9, 2022.1.0a7
Not reproducible with: 2019.4.30f1, 2020.3.18f1, 2021.1.20f1 (issues with packages prevent testing)

Reproduced with:
iPhone 6 (iOS 12.4.8)
iPhone 7 (iOS 12.3.1)
iPhone 12 Mini (iOS 14.1)
VLNQA00277, Asus ROG Phone, Android: 8.1.0, CPU: Snapdragon 845 SDM845, GPU: Adreno (TM) 630
VLNQA00006, Samsung Galaxy S7, Android: 8.0.0, CPU: Exynos 8 Octa 8890, GPU: Mali-T880
VLNQA00121, Samsung Galaxy S9, Android: 9, CPU: Exynos 9 Series 9810, GPU: Mali-G72

Notes:
- Link to video of the reproduction available in the edits