Graylog long messages being truncated

Hi,
I have a problem with Graylog.
Sended long app logs from container on kubernetes are being truncated.
For example full message from stdout have over 26k characters and size 28kb but in graylog cut it to 16k characters and 20kb.
There is possiblity to increase it or not ?
Below my input config:
Receive Buffer Size (optional) : 40485760
Maximum message size : 40485760
Decompressed size limit (optional) :40485760

I use in docker:
Graylog 6.0.6
Opensearch: 2.15