[Fern]

See title, the cinder damage gets split if you willingly Chariot Star/Godray Undertorw across cinders, rather than do full damage per tile as it does with other voluntary movement (such as Geist Schritt).

To test, make someone else lay down cinders and just Chariot/Godray into them.

[AkaInuHime]

Ice slide (and presumably fire dance) also take reduced damage from tiles.

(This is across firespitter cinders)

[Neus]

This is not a bug, skills that move you should be splitting the damage. You should only take full damage when using Move over them (or other effects like Move, such as Conductor's Direction).

Geist skills have been corrected in this regard.