readwritesplit module - intensive load - SQLSTATE[HY000]: General error: 2013 Lost connection to MySQL server during query

The module readwritesplit works perfectly for small queries. An operation of reading 80,000 rows from the db and processing it and writing to the db causes maxscale to return:

SQLSTATE[HY000]: General error: 2013 Lost connection to MySQL server during query

Meanwhile if readconnroute module is used for the above purpose. It does it without any errors.

EDIT1
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Please find the configuration I used.
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#/etc/maxscale.cnf
[maxscale]
threads=4
auth_connect_timeout=600
auth_read_timeout=1200
auth_write_timeout=1200
maxlog=1
log_info=1
log_debug=1

[Splitter Service]
type=service
router=readwritesplit
servers=devdb01, devdb02
max_slave_connections=100%
user=XXX
passwd=ZZZ
enable_root_user=true
localhost_match_wildcard_host=1
router_options=synced

[Splitter Listener]
type=listener
service=Splitter Service
protocol=MySQLClient
port=3306
address=127.0.0.1

[devdb01]
type=server
address=192.168.0.110
port=3306
protocol=MySQLBackend
[devdb02]
type=server
address=192.168.0.111
port=3306
protocol=MySQLBackend

[Galera Monitor]
type=monitor
module=galeramon
disable_master_failback=1
servers=devdb01, devdb02
user=XXX
passwd=ZZZ

[CLI]
type=service
router=cli

[CLI Listener]
type=listener
service=CLI
protocol=maxscaled
address=localhost
port=6603

Log
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Please find the log in attachment.