Solr has a limit on the number of facets - which has nothing to do with the Query.MaxItems btw (that is for Sitecore queries). You should be able to set facet.limit to -1 to get all results.
Not sure if in the current implementation by Sitecore there is another solution possible already, but this was given ...
in <searchComponent name="spellcheck"> node of solrconfig.xml
rebuild dictionary and request spell checking like:
var results = ctx.GetSpellCheck(new SolrQuery(Term), new ...
We worked with Sitecore support to discover this is a known issue with some versions of Sitecore including ours Sitecore 9.1 Update-1.
Deadlock on application start
Using federated authentication with Federated Experience Manager (FXM) might prevent Sitecore XP instances from starting.
If a Sitecore XP application is not starting, then create a memory dump ...