Autocomplete broken in Transfer description field

Binary package hint: gnucash

I'm running Gnucash 2.0.5 on feisty.

In the "Transfer Funds" dialog box, the "Description" field is supposed to autocomplete with descriptions of previous transactions -- at least, it did in the previous version of gnucash. I would type the first letter of the description and the remainder of a guess would appear, but highlighted, so that if I then typed a second letter it would be replaced by a guess based on the first two letters, and so on.

Now, when I type the first letter, a guess does appear, but it is not highlighted, and the cursor is at the beginning of the line, so that when I type the second letter the autocomplete breaks. For example, if I have previous transactions called "Health Food" and "Home Depot", then when I type "H" the more recent one appears -- say it is "Home Depot" -- but if I then continue by typing "e" what I get is not "Health Food" but "eHomeDepot". This is completely reproducible as far as I can tell.

However, if after typing "H" I press and release another non-inserting key, such as shift, control, or tab, then the remainder of the guess (that is, "ome Depot") does become highlighted, and if I then type "e" it does change to "Health Food" as it should.