Possible memory leak

After we upgraded from 2.2.x to 2.3.x and moved our production cluster to this version maxscale keeps increasing it's memory usage until reaches 100% (we didn't let it OOM due to the production nature). Our configuration is as follows:

type=service

router=readwritesplit

servers=db1,db2,db3

connection_keepalive=30

max_sescmd_history=0

disable_sescmd_history=true

master_accept_reads=false

master_failure_mode=fail_on_write

enable_root_user=true

master_reconnection=false

prune_sescmd_history=true

causal_reads=true

causal_reads_timeout=2

What is the best way to debug this further? We handle about 2000 qps with a mix of short and long lived sessions