[Bug] Unitless CSS Variables when value is same as previous

[bwyx]

1. Describe the bug

I animated CSS variables, but there was a glitch when the animation ended with the value provided same as previous.

the CSS value becomes unitless

2. IMPORTANT: Provide a CodeSandbox reproduction of the bug

I created this codesandbox: https://codesandbox.io/s/unitless-css-variables-lufo4d

3. Steps to reproduce

Steps to reproduce the behavior:

1. Go to codesandbox
2. move cursor inside preview to trigger animation,
3. try not to change some axis, wait for the animation to end
4. See behavior

4. Expected behavior

animated CSS variables provided as is when the animation end

5. Video or screenshots

recording_2023-03-13T20.43.07.101977033+07.00.mp4

6. Browser details

Chromium 109.0.5414.74 (Official Build) Arch Linux (64-bit)