FORM 8606 Bug

Simple Question filing FORM 8606 on my 2024 Return. (Turbo Tax Help Desk can not resolve after 2 days and 4 hours troubleshooting this issue).

ISSUE: Turbo Tax did not roll my Non-Deductible Basis over. (Have not contributed to Traditional IRA since 2013).

STEPS TAKEN: Entered my correct basis in the IRA section where it asks for previous years basis. (Also tried on worksheet and directly on FORM 8606 which just loops you back to worksheet).

RESULTS: Turbo Tax then RUNS a CALCULATION and substantially increases my refund????

QUESTION: How do I get my basis back onto Form 8606 WITHOUT any calculation?

(Note: Firmware is up to date and was reinstalled, also tried updating basis under amended return).

WHAT IF: Logically, what if a NEW USER of Turbo tax tried to enter their 8606 Basis? They could not do it without the program increasing their refund. 

BUG?:  This may be a BUG in the software.  Turbo Tax should escalate this to a programmer who can test this themselves.

WORKAROUND:  I see of no workaround for this issue, neither could a turbo tax rep.

USER ERROR: Not ruling out user error either, but talking with Turbo Tax rep who confirmed this should not happen my sense is that it is sense is a bug in the program.

TO TURBO TAX: If there is a workaround please share it with everyone.  If it is a bug please notify when it has been corrected.

Appreciate any help to resolve this.