I would imagine with everything wiping past each other during insertion, that the following can happen briefly:
<== plug T R S / \ / \ / T R S jack
Is this just something that systems that allow hot-plugging have to accommodate? Is there something in a spec to prevent this? If this scenario isn't possible, but something slightly less bad can happen, please explain?
(That is, I'd accept "Yes." as an answer, but "No." would require justification.)
Can internal switches in jacks help mitigate this? I assume most are normally-closed and break as soon as insertion starts, so that's not very helpful. Are there jacks with internal switches that only change state at full-insertion?