Spellcheck not returning output array for single character

[Zheng Lin Edwin Yeo]

Hi,

I am using Solr 7.5.0, and I have found that when we call the spellcheck
handler with a single character search (Eg:
http://localhost:8983/solr/collection1/spell?q=6), the output array like
the below is not shown.

"spellcheck":{

    "suggestions":[],

    "correctlySpelled":true,

    "collations":[]}}


However, if the search is for two or more characters (Eg:
http://localhost:8983/solr/collection1/spell?q=66), then it will show.

What could be the reason behind this?

I have set the minQueryLength to be 4 in the solrconfig.xml.

Regards,
Edwin