This behavior was introduced in 26.1-snapshot-4.
Translucent blocks behind breezes, slimes and players render in front of them when looking through translucent blocks.
Linked issues
relates to 4
MC-305850
Translucent blocks and fluids are no longer visible behind translucent particles if "Improved Transparency" is disabled
Resolved
MC-306127
Block outlines are no longer visible behind translucent items
Open
MC-306088
Translucent blocks and fluids are no longer visible behind translucent items being picked up if "Improved Transparency" is disabled
Resolved
MC-306129
Debug gizmos do not render behind translucent items
Resolved
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