Double-tapping Apple Pencil Pro to switch tools in Photoshop (iPad) doesn’t switch back

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I'm working on an iPad Pro M4 with the Apple Pencil Pro. I set “Photoshop for iPad” to switch to last tool when I double-tap the pencil. When I double-tap, it will switch to the previous tool. But when I double-tap again, it stays on that tool. I would expect this feature to work like it does in Freeform, where repeated double-taps on the pencil switches back and forth between the current and last used tools. Is this the expected behavior in Photoshop for iPad? Or am I missing something? (For example, I use the brush tool, then use the dodge tool. Double-tapping switches back to the brush tool, but a second double-tap doesn't switch to the dodge tool. I've tried this with other combinations of tools too, with the same result.) Thanks!