I have the same issue. Just showed up in a production app. Does this have something to do with NSAppTransportSecurity?
2020-10-12 13:56:42.553548-0700 VideoTest[13260:444678] [] [13:56:42.554] FigSubtitleSampleCreateFromPropertyList signalled err=50 (kFigCFBadPropertyListErr) (NULL or bad plist) at /Library/Caches/com.apple.xbs/Sources/EmbeddedCoreMedia_Sim/EmbeddedCoreMedia-2755.24.7/Prototypes/ClosedCaptions/FigCaptionCommand.c:792
camera_func
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