Steps to reproduce:

Create a new 2D URP project
Go Assets > Create > 2D > Sprites > Square
Go to GameObject > 2D Object > Tilemap > Rectangular
Open Window > 2D > Tile Palette and create a new palette
Drag the Square sprite into the palette to generate a Tile
Switch to the Select tool and select a cell that is not painted
In the Inspector the Tile field reads "None (Tile Base)", but Offset, Rotation, Scale and Color are all enabled
Change any of those fields

Actual results: The field immediately snaps back to 0. Offset, Rotation, Scale and Color all accept input and instantly revert, with nothing greyed out and no warning or explanation shown
Expected results: Input that cannot be applied should not be silently discarded - either disable the fields or indicate that the selection contains no tiles

Reproducible with versions: 6000.0.0f1, 6000.3.23f1, 6000.6.2f1, 6000.7.0b1

Tested on (OS): macOS 26.5, Ubuntu 24.04

Notes:

This workflow can also be reached from a valid selection: select a painted cell, then use Modify Tilemap > Insert Row (count 1) > Modify. The tiles shift up a row, the selection stays at its old bounds which are now empty, and from then on no transform value can be edited with no indication why
Documentation does not specify behaviour for selections containing no tiles. Filing on the basis that these fields already have a DisabledScope for the LockTransform/LockColor case, and that ~~UUM-79201~~ was fixed for the same class of problem