Azure search not behaving as expected for dashes

I’m having an issue when using azure search for the following example data set: abc-123-456, abc-123-457, abc-123-458, etc
When making the search for abc-123-456, I’d expected to only return one results but instead getting all results containing abc-123-…
Is there some setting or way to change this behavior?

Current search settings:

TheSearchIndex.TokenFilters.Add(new EdgeNGramTokenFilter("frontEdgeNGram")
{
    Side = EdgeNGramTokenFilterSide.Front,
    MinGram = 3,
    MaxGram = 20
});

TheSearchIndex.Analyzers.Add(new CustomAnalyzer("FrontEdgeNGram", LexicalTokenizerName.Whitespace)
{
    TokenFilters =
    {
        TokenFilterName.Lowercase,
        new TokenFilterName("frontEdgeNGram"),
        TokenFilterName.Classic,
        TokenFilterName.AsciiFolding
    }
});

SearchOptions UsersSearchOptions = new SearchOptions
{
    QueryType = SearchQueryType.Simple,
    SearchMode = SearchMode.All,
};

Using azure.search.documents ver 11.1.1

Edit: Search with abc-123-456* with the asterisk gives me the one result as expected. How to get this behavior working as default?

Just to add to this..

The portal version is 2020-06-30
The sdk version we use is azure.search.documents ver 11.1.1

1. abc-123-456 does NOT work as expected
2. "abc-123-456" does NOT work as expected
3. "abc-123-456"* does NOT work
4. "abc-123-456*" does NOT work

If we append an asterisks to the end of the search text and it is not within a phrase .. it works as expected.
IE:
abc-123-456* works as expected.
(abc-123-456* | abc-123-457* ) works as expected.

Why is the asterisks required? How can we make this work within a phrase?