Kubernetes logs split in kibana

I have Kubernetes system in Azure/eks/gcp and used the following instrustions to install fluent, elasticsearch and kibana: https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/fluentd-elasticsearch I am able to see my pods logs in kibana but when i send logs more then 16k chars its just split.

if i send 35k chars . its split into 3 logs.

how can i increase the limit of 1 log? I want to able to see the 36k chars in one log.