Constantly getting warning message Exception while improving searchresult about fulltextsearch HOT 2 OPEN

Hi,
I'm having the exact same issue here. The only difference is the final line:
GET /ocs/v2.php/search/providers/fulltextsearch/search?term=bru&from=%2Fsettings%2Fapps

NC 27.1.6 in Debian 12 Bookworm LXC Container in proxmox (TKL Nextcloud template - older version but successfully upgraded to bookworm)
PHP 8.2.7 (cli) (built: Jun 9 2023 19:37:27) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.2.7, Copyright (c) Zend Technologies
with Zend OPcache v8.2.7, Copyright (c), by Zend Technologies
elasticsearch/stable,now 8.12.0 amd64 [installed]
tesseract-ocr/stable,now 5.3.0-2 amd64 [installed]

NC Apps:
full text search: 27.0.3
full text search - elastic search platform: 27.0.5
full text search - files: 27.0.1
full text search - files - tesseract ocr: 27.0.0

This server has been around for more than a year, starting with NC 18 or so, has been upgraded through debian, php and NC versions until it reached this stage.
However, I only installed and configured the full text search and tesseract features only about 1 week ago, so I am unable to ascertain if these errors would have shown in older versions....

On an other, not yet upgraded to Bookworm version I don't have these errors at all.
Debian 11 Bullseye LXC Container in proxmox (TKL Nextcloud template - older version but newer than the other one)
PHP 8.1.27 (cli) (built: Dec 21 2023 20:17:59) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.1.27, Copyright (c) Zend Technologies
with Zend OPcache v8.1.27, Copyright (c), by Zend Technologies
tesseract-ocr/oldstable,now 4.1.1-2.1 amd64 [installed]
Everything else has the same versions as above and the fulll text search and tesseract features have been set up at the same time as the other one.
Thanks in advance

from fulltextsearch.

Getting the same issue here on Debian 12 and Nextcloud AIO.

from fulltextsearch.