Forest Construction Hangs

Hello. I was attempting to build a decision tree using Float32 data and construction seems to hang for certain input data. Here's a small example.

using DecisionTree

#Tree construction does not seem to hang for Float64s with this array, but does for Float32s and 16s.
#I have had hangs with Float64's with different data.
indep=Float32.([ 9.4  9.4   1.1
9.4  9.4  -0.0
9.4  9.4   1.9
9.4  9.4   1.4
9.4  9.4   1.1
9.4  9.4   0.0])

dep=Float32.([ -0.4
-0.2
-1.1
 0.0
 0.0
 0.0])

#The decision tree construction hangs for 9.4, -1.0, and 15.6, but not for 2.0 or 2.5??
indep[indep.≈9.4] .= 15.6

display(dep)
display(indep)

#This occasionlly doesn't hang the first time, but it has always done so on the second run.
build_forest(dep, indep, size(indep, 2), 10, 0.7)

When I managed to keyboard interrupt this in the REPL it seemed to be getting stuck in some threading situation.

Here are the versions+hardware I'm using
DecisionTree: v0.10.11
Julia: v"1.6.3" for Intel Mac (downloaded as a binary from the Julia Website) running through Rosetta 2
Computer: MacBookAir with M1 Chip.

I also downloaded Julia1.7 for Intel and AArch64, and got the same hang.

Start with the reproducible Float32 example in the issue and run build_forest(dep, indep, size(indep, 2), 10, 0.7) using the reported Julia and DecisionTree versions. Trace the forest-construction entry point and its threading behavior, then verify that the example completes reliably for the reported input values and numeric types without hanging.