Is there any way to avoid the "Too many queued chunks" warning?

Is there any way to avoid the "Too many queued chunks" warning? How big of an issue is that warning? I'm only using around 5-6% of my RAM. I cannot use Distant Generation for the map I'm rendering sadly, it'll just show the world seed, not the custom map... 2.2.1a I'd like to fly around a lot and wait for an ~hour, not every 5 minutes gotta fly wait fly wait, etc... Example of the map:

Solution:

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