Ctrl+D ignores dots when this extension is installed, in Elixir files

[Fire-Dragon-DoL]

Hello,
When this extension is installed, Ctrl+D (Add Selection To Next Find Match) seems to behave differently (on elixir files). Instead of selecting one word, it selects one word ignoring dots, which means it selects entire lines in some situations. Example:

alias Foo.Bar.Baz

Assuming cursor is on Bar (letter a), if I press CTRL+D with the extension enabled, it selects Foo.Bar.Baz. With the extension disabled, if I press CTRL+D selects just Bar.

For reference, I discovered this behavior happens also with JSON files (unrelated to the extension). Is it something related to the syntax highlight? How can I prevent it?