Inconsistent typeahead when searching

[Daniel618]

Operating System: Windows

Steps to Reproduce:

1. Go to DocFx documentation

2. Type "Attr"
   

3. Type "Attri"
   

4. Type "Attribut"
   

Expected Behavior:
The same search results are returned when you continue to type a word.

Actual Behavior:
When searching you get typeahead suggestions after typing a couple of letters but if you continue typing the suggestions dissappear. After a few more letters suggestions can return but can be completely different.

I have the same issue for most words not only "Attrbiute" in the above example.