So, I wanted to test the theory that it worked with just one ESPP transaction. I can confirm that it did NOT work for me. TT seems to calculate $0 for the proceeds and cost basis for all ESPP transactions.
To test it, I made a 2nd duplicate copy of my tax file. Then I went in to my copy and deleted my entire 1099-B section and all of my stock transactions. I then hand entered one ESPP transaction using the data from my 1099-B and my form 3922.
TT still gave me a cost basis of $0, and proceeds of $0. It did ask me if the income was on my W2 (that was new). This was after yet another software update just today, Fri. Feb. 5th.
So it seems this is still not fixed for ESPP transactions.
