Completions work for object-dot-partial but not for object-space-partial

[megaannum]

Consider the following:
val s = "hi"
val i = s.si
In this case, Envim completions returns "size".
Now consider
val s = "hi"
val i = s si
In this case "Pattern not found" is returned.
I have communicated with Aemon and he says that both work
for Emacs-Ensime.