Excess Roth contribution in 2018 withdrawn before 2019 deadline. Why does 2018 amend show me getting taxed when amount withdrawn is less than contribution due to loss?

I have a 2019 1099-R form, but TurboTax told me I need to amend 2018 form. Now 2018 amended form says I owe money on the loss - which doesn't sound correct to me.