In Logos 5.3? or so, the bug was fixed that prevented superscripts for Papyrus documents when hovering over a TC mark in NA27GBS. But the bug is back in Logos 6.
At Acts 26.16:
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The hover should read the same as the open apparatus:
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Note in the same line, the superscript "2" is also not showing up on "C" and in the "txt" line the "vid" is missing from "C*", although the "*" is present on the "C" in the hover.