can't suggest class name exactly.

[insight1111]

atom: 1.23.1
os: windows10 64bit
laungage-pug: 0.0.21

expected:
for example, there is some class names, "p-button" "u-text".
type "div.p-" then suggest "p-button"

get:
but I get
type "div.p-" then suggest "button"
and many class name has not suggest.
Off cource, autocomplete-plus package setting "all buffer" is true.
and I open css file.

[insight1111]

It worked correctly atom v1.21.2.
But newer version atom,not worked.