Render parameters are missing when we are creating a render URL to portlet 2 from portlet 1 using liferay-portlet:renderURL.
Created render URL to Portlet 2 using plid and portlet name. then added some parameters using param tag.
When click link in portlet 1 we are seeing portlet2 but it's not receiving any parameters.
I did noticed that when creating renderURL if we use portlet instance ID instead of portlet name parameters are being sent.