In December, 1384, Richard II. 'held his Christmas' at Eltham (Fabyan).
I think lines 568, 569 (added in B.) are meant to refer directly to ll. 703, 704.
The Knightes Tale is a clear exception. The original Palamon and Arcite was too good to be wholly lost; but it was entirely recast in a new metre, and so became quite a new work.
It is amusing to see that Chaucer forgot, at the same time, to alter A. 422 (= B. 432), in which Alcestis actually tells her name. The oversight is obvious.
Line A. 277 reappears in the Canterbury Tales in the improved form—'And ever a thousand gode ageyn oon badde.' This is the 47th line in the Milleres Prologue, but is omitted in Tyrwhitt's edition, together with the line that follows it.