Another strange thing, If I open TWS Option chain for these TESLA options first.
And i do the API requests in a second stage, I receive delayed bid/ask prices through the API running TWS > 9.76
So I suspect this behavior is related to IB pacing algorithm (at it has been introduced after TWS 9.73 which works fine.
Few months ago, IB support recognize there was a bug about it.
Regards,
