How to reproduce:
1. Open the attached project (trunk-testing.zip)
2. Drag and drop any sprite from Assets/Art/Tilesets/Tiles_correct into "Dungeon_palette" tile palette
3. When prompted to create an asset, select Assets/Art/Tilesets/tile_assets folder
4. Select multiple other Sprites from Tiles_correct and drag and drop them into tile palette as well
5. When prompted to create assets, observe and press "Choose"/"Ok"
Expected result: Last selected folder should be selected and everything imports correctly
Actual result: Last imported asset is selected and when importing Editor throws an error
Reproducible with: 2023.1.0b2
Could not test with: 2020.3.44f1, 2021.3.18f1, 2022.2.4f1 (Tile palette gets broken after downgrading)
Reproduced on: MacOS 13.0.1 (MacBook Pro M1 Max)
Error: Parent directory must exist before creating asset at Assets/Art/Tilesets/Tiles_correct/big_demon_idle_anim_f3.asset/big_demon_run_anim_f1.asset.
UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)