A
compare
b. 73
Most probably Chopin added the staccato dot in a proofreading of FE (→GE,EE). In A the reason for its omission could be a mistake whose correction required rewriting the entire bar.
Compare the passage in the sources »
See b. 77
category imprint: Differences between sources; Corrections & alterations
issues: Errors resulting from corrections, Authentic corrections of FE
notation: Articulation, Accents, Hairpins