Tilemap : problem rotating and flipping a group of tiles

I’m using the Unity tilemap editor and when selecting a group of tiles, if I rotate them and flip them at the same time, 2 of the rotations are broken, it’s something like the tiles are rotating individually instead of rotating the whole selection. Is it a known issue or can be solved somehow?

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How do you flip the tiles? Is there a shortcut or are you doing it with the rotation settings?