The object-position and perspective-origin properties should not accept 3 part values like "top right 20%". This also applies for positions in basic shapes and gradients. Valid position values always have 1, 2 or 4 parts. Deprecation of 3-part values is occurred in Chrome 66, and removal occurred in Chrome 68.
Specification
Specification being incubated in a Community Group
Status in Chromium
Removed
(tracking bug)
Consensus & Standardization
After a feature ships in Chrome, the values listed here are not guaranteed to be up to date.
Owner
Last updated on 2020-11-19
Comments
https://drafts.csswg.org/css-values-3/#position