Appservers not running with balanced load in PT8.52.22

I am facing a peculiar problem in PeopleTools 8.52.22 environment, Tuxedo version is 10.3.0.0, (patch 141) 64-bit and weblogic version is 10.3.6.0.

We have 2 appservers (ap1 & ap2).

appserver1 is on ap1

appserver2 is on ap2

We have only one webserver (PIA) on ap1 & its connected to both appservers that are load balanced, such that configuration.properties has below string

psserver=h00ap1hris1:9250#1,h00ap2hris1:9260#1

Also Jolt Pooling is turned on

joltPooling=true

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The issue is this - On a given day start only 1 appserver takes entire workload while as most of the time the 2nd appserver is dormant.

Lets say today ap1 is handling all load & ap2 stays almost dormant.