150DB Depreciation Calculations Incorrect?

I have a 7-year asset purchased in 2014 and 150DB/HY was selected as the method/convention.  The cost basis was $6,500.  I've used several depreciation calculators and they all say the same values shown below in the "Calculator" column; however, TurboTax has deducted the values in the "TurboTax" column:

 CalculatorTurboTax
2014696696
201512441244
2016977977
2017768796
2018603796
2019474796
20201738????

 

Why are years 4, 5 and 6 "stuck" on 796 and not following what seems to be the consensus via the calculators?  Other assets of mine are different starting in year 4 as well (5-year assets).