With Win32's CMD.exe (or 4NT.exe or TCC.exe, which I'm generally using), the shell gets confused with that '%' (even when escaped, it seems)
Did you take into account that CMD escapes % differently from other characters? See e.g. on SS64 under "Escaping Percents"

In reply to Re^2: How can I use printf FORMAT strings for (Win32) shell globs? by soonix
in thread How can I use printf FORMAT strings for (Win32) shell globs? by ozboomer

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