How to reproduce:
1. Open the attached project ("UIToolkit Bug.zip")
2. Build And Run the Scene "test" on a touch-enabled device
3. Tap and hold on one of the blue buttons
4. While holding, tap somewhere else with a different finger
5. Release both fingers

Expected result: The blue Button transitions to its original size
Actual result: The blue Button does not transition to its original size and gets stuck

Reproducible with: 1.1.1 (2021.2.0b15, 2022.1.0a11)
Could not test with: 2019.4.31f1 (UI Toolkit package not available, cannot open project), 2020.3.19f1, 2021.1.24f1 (project's UI breaks after installing the package version of UI Toolkit/downgrading)

Reproducible on:
iPhone 8 Plus (iOS 14.4.2)
iPad 6th generation (iOS 14.4.2)
iPad Air 2 (iOS 11.0.3)
VLNQA00288, Samsung Galaxy J7 (SM-J730F), Android 8.1.0, CPU: Exynos 7 Octa 7870, GPU: Mali-T830
VLNQA00022, Xiaomi Redmi Note 3 (Redmi Note 3), Android 6.0.1, CPU: Snapdragon 617 MSM8952, GPU: Adreno (TM) 510
VLNQA00001, Google Pixel 2 (Pixel 2), Android 11, CPU: Snapdragon 835 MSM8998, GPU: Adreno (TM) 540
VLNQA00316, Samsung Galaxy Note10 (SM-N970F), Android 9, CPU: Exynos 9 Series 9825, GPU: Mali-G76
VLNQA00225, Qualcomm null (SDM845 for arm64), Android 8.1.0, CPU: Snapdragon 845 SDM845, GPU: Adreno (TM) 630

Note:
- Not reproducible with the old input system
- Not reproducible with Input System UI Input Module's “All Pointers As Is” or “Single Mouse or Pen But Multi Touch And Track” Pointer Behaviors