SD card showing as corrupted on rooted MM (works fine on non-root phone)

As mentioned in the title, the SD card is showing as "corrupted" on my phone (MM, root). If I pop it in my wife's Note 4 (official firmware, non-root), it works just fine. So, there's absolutely nothing wrong with the card and I'm assuming that root is the culprit. Has anyone noticed a similar issue? If so, have you found a solution? Going the non-root route is not an option for me. Thanks in advance.

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