yes, in fact there are 2 messages related to the search
- [fulltextsearch_elasticsearch] Warning: debug - request: (following details relating the search-string, snipped it off)
followed by this Message-Type
- [no app in context] Warning: 500 (…) illegal_argument_exception",“reason”:“The length of [content] field of [files:53160] doc of [nc_index] index has exceeded  - maximum allowed to be analyzed for highlighting. This maximum can be set by changing the [index.highlight.max_analyzed_offset] index level setting. For large texts, indexing with offsets or term vectors is recommended!”}] (…)
this seems to me to be the important part of the message and to give an indication of the problem.
do I see that correctly, as if indexing is running, but there is a problem displaying the results?
how can I solve this?