I believe you have encountered a scenario that is not supported by TurboTax.
When Box 7of Form 1099-B is checked, the program does not limit losses based on gross proceeds from a reportable change in control or capital structure reported in Box 6 of that form.
See https://digitalasset.intuit.com/DOCUMENT/A7LDFEv4x/040120-2019-unsupported-calcs-L1FQfTTgn.pdf
