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Though I would still recommend you try a slightly heavier grind next next time, no, that's not unreasonable. It is quite a bit more than I have to do, but in my mind, a quick touch up is not the same...

You don't mention the grind. If it's very hollow, with a lot of flex, a tough beard may actually be distorting it.
If you buy another, it may be worth considering trying out a heavier grind, such...