Bug: 4.2a Beta 5: Blue arrow disappears in Search box after arrow down to select from list

Open a Basic Search tab with all the default settings
Start typing in something, and once it populates the dropdown menu, use the down arrow to select an item in the list.
The blue arrow that you're supposed to click on to execute the Search disappears. It doesn't come back even if you change your mind about what you wanted to type in the Search box (e.g., you realized you mistyped it). For example, in this case, I typed John. The blue arrow is there:
Then I pressed down arrow once or twice. The blue arrow disappears:
If I press backspace twice and type an 'n' (to make the search text Jon), the blue arrow still doesn't come back. It does come back if I do some more stuff, or if I click outside the dropdown list so that it pops back up again. But I shouldn't have to. The disappearance of the arrow shouldn't have happened in the first place. Besides, it could confuse users who are used to clicking on that as the only way to execute a search (they might not know you can press Enter).
Comments
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The arrow disappears after you arrow down because the drop-down has focus and expects a selection, and then once something is selected, the arrow returns to search on that word. When you backspace to make a correction, let's say to remove the 'n' at the end of 'John', the drop-down still has focus, so you could either select 'Joh' at that point and press Enter, or you could backspace to 'Jo' and type an 'n' for 'Jon', and then the arrow returns.
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Melissa Snyder said:
The arrow disappears after you arrow down because the drop-down has focus and expects a selection, and then once something is selected, the arrow returns to search on that word. When you backspace to make a correction, let's say to remove the 'n' at the end of 'John', the drop-down still has focus, so you could either select 'Joh' at that point and press Enter, or you could backspace to 'Jo' and type an 'n' for 'Jon', and then the arrow returns.
OK, I see what you're saying. But if after arrowing down I backspace over the n and then the h, the highlight in the list box disappears, and the blue arrow is still gone:
If I press Enter at this point, even though there's no blue arrow, Logos will launch a search on the text that is in the edit box (Jo). That behavior is consistent with the edit box having the focus, not the list box. Since clicking on the blue arrow is equivalent to pressing Enter, the arrow should be available whenever Enter is available for launching a search. I can accept the blue arrow not being there if Enter is going to take the highlighted item in the listbox and put it into the edit control. But that isn't the case in this situation here.
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