Stabilizer scissor jacks

[PopPopK]

I have a 2019 Gulf stream Ensbruck 28 ft travel trailer. The stabilizer s are scissor jacks attached to the frame.
Question: How or what can I do to stop the shaking when you walk inside when the jacks are down? I do 1 turn after the jacks contact the yellow blocks so they a fairly snug.
I have the yellow blocks I use under the jacks. It also looks like there is only 1 place the jacks are welded to the frame.

Thanks
I might have posted a similar request some time ago so excuse me if I did(short memory)
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