OK-case: from insert-mode: place cursor at first atom, then cmd-d twice.
Result: atom and atom are selected.
NG-case: from normal-mode: place cursor at first atom, then cmd-d twice.
Result: atom and "atom(ic) are selected.
Detail
When executing from normal-mode, it no longer respect word-boundary matching.
Why this happens is vmp auto activate visual-mode on first cmd-d create selection.
At that timing, vmp clear important information which is used by cmd-d(find-and-replace:select-next)
find-and-replace's SelectNext instance hold this.wordSelected state, but it's cleared by lastSelection.onDidChangeRange which is exactly kicking when starting visual-mode.
t9md
commented
7 years ago 
Related #873
cc @chenglou
Reproduce
text
insert-mode: place cursor at firstatom, thencmd-dtwice.atomandatomare selected.normal-mode: place cursor at firstatom, thencmd-dtwice.atomand "atom(ic)are selected.Detail
normal-mode, it no longer respect word-boundary matching.visual-modeon firstcmd-dcreate selection.cmd-d(find-and-replace:select-next)SelectNextinstance holdthis.wordSelectedstate, but it's cleared bylastSelection.onDidChangeRangewhich is exactly kicking when startingvisual-mode.