So my infusion altar seems to be having some kind of problem. Whenever I use it, it shakes around like mad, even with a negligible, or minor instability infusion. However, here's the thing. It also makes no flux. Here's a video of what I mean by crazy shaking. Skip to about 15 seconds, if you're super impatient, the first 15 seconds are showing that there is, actually, symmetrical stabilizers.
To be fair, this shows that your tiny room is balanced; are you aware that the range is +- 12 from the altar, so a 25x25 square withe the Altar at the center? There could be a roomful of imbalance just beyond the wall. Only heads, candles, and crystal clusters count.
There are no heads, candles, or clusters anywhere else in my base, and I have made dangerous level infusions fine here. I've never had a problem with flux when infusing, just the strange shaking, which is pretty funky. I do have candles inside the y+10 -5 area under and above my altar for stabilization
That's quite the shaking...I'll make the assumption it changes due to the amount of objects preventing instability around it. As far as I know, it's just an animation and doesn't really change/do anything.