Did some continuity testing, and the SCK pin on the BlueGiga chip has continuity with the 3v rail. Maybe that's the root of it.
From reading the datasheet, it appears that SCK (and SWS) are bidirectional. The Wt32i can be programmed to have those as inputs (what we need), or as outputs. If the latter, then you'll see 3.3V on them (bad).
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