[DOCS] Note that cutoff_frequency doesn't handle stacked tokens gracefully

docs/reference/query-dsl/queries/match-query.asciidoc

@@ -97,6 +97,13 @@ The `cutoff_frequency` can either be relative to the number of documents
 in the index if in the range `[0..1)` or absolute if greater or equal to
 `1.0`.
 
+Note: If the `cutoff_frequency` is used and the operator is `and`
+_stacked tokens_ (tokens that are on the same position like `synonym` filter emits)
+are not handled gracefully as they are in a pure `and` query. For instance the query
+`fast fox` is analyzed into 3 terms `[fast, quick, fox]` where `quick` is a synonym
+for `fast` on the same token positions the query might require `fast` and `quick` to 
+match if the operator is `and`. 
+
 Here is an example showing a query composed of stopwords exclusivly:
 
 [source,js]