Heavy pulsating or water hammer during brine draw

[KS2]

Hello
Recently installed an 32K grain aqua sure water softner (3 months). Recently when the unit is in brine draw during regen the system is heavily pulsating or possibly experiencing water hammer and putting heavy vibration in piping.
The drain is about 20 feet away and I transitioned to 3/4" pex as instructions required.
It's newer and may have only gone through a couple of Regens, but I don't recall this noise in the past and it is fairly loud.
I have attached a video of the system during this phase so u can see the plumbing and hear the noise I'm referring to.
Looking forward to hearing your thoughts.

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[Reach4]

Did this oscillation only start once the brine had been sucked out (typically about 15 minutes)? Or did this start at the beginning of the brine draw cycle?

Which ever way you answer, I don't have a good candidate cause...