Adobe Target Pre hiding snippet impacts page performance

Hi Team,

We are using Adobe Target legacy pre-hiding JavaScript snippet with 1500ms timeout to avoid flickering but page performance tools flagged this as a potential cause for low scores in desktop and mobile. Adobe support team suggested to use Flicker Manager V2(Beta) with timeout 2000ms and 1500ms but we still see flickering.

Our Launch configuration has Adobe Target V2 extension configured with 3000ms timeout. I read in few articles that these two timeout configurations complement each and are required.

I have couple of questions

1. Is pre hiding snippet required to be loaded on web pages where we do not have A/B test activity or personalized content? Or can we load only on pages where they are configured?
2. Did anyone use Flicker Manager V1/V2 ? Does it solve the flickering and page performance issues?