unrelated println statement leads to blank plot

I encountered a strange bug in PyPlot that a println statement in a certain place in my code causes a plot to come out completely blank. Below is a stripped-down version of my code. If I `include` the code as is, then it makes three plots, but the third plot window is empty. However, if I comment out the `println` statement on l. 23, then the third plot appears as expected. This is Julia version 1.8.2, PyPlot was just installed today (2022-10-16), python version (according to Pyplot) is 3.9.12, matplotlib version (according to the error message when I type `hold(true)` at the REPL) is 3.5.2, and the platform is Windows 10.
```julia
module driver_ppbug
using LinearAlgebra
using PyPlot

function admm1(a)
n = size(a,2)
clusterID = vcat(ones(Int(n/2)),2*ones(Int(n/2)))
itcount = 1
return clusterID, itcount
end

function find_k_largest_clusters(clusterID, k1)
return vcat([[1,2,3,4], [5,6,7]], [[i] for i = 8 : length(clusterID)])
end

function plotresult(a, clusterID)
n = size(a,2)
colors1 = "rgbcmky"
mxcolor = length(colors1)
result = find_k_largest_clusters(clusterID, mxcolor)
println("result lens = ", [length(q) for q in result])
plotted = [false for i = 1 : n]
for i = 1 : mxcolor
if length(result[i]) > 1
plot(a[1,result[i]], a[2,result[i]], "*" * colors1[[i]])
else
break
end
plotted[result[i]] .= true
end
plot(a[1, .!plotted], a[2, .!plotted], "." * colors1[[mxcolor]])
axis("equal")
nothing
end

function gm_generator(n)
a = hcat(collect(1.0:1.0:n), sin.(1.0:1.0:n))'
compID = vcat(ones(Int(n/2)), 2*ones(Int(n/2)))
weight = ones(n)
return a, compID, weight
end

function mxgau(n, sigma, lambdascale1, lambdascale2)
a, compID, weight = gm_generator(n)
sub1 = findall(compID .== 1)
sub2 = findall(compID .== 2)
close("all")
figure(1)
plot(a[1,sub1], a[2,sub1], "*r")
plot(a[1,sub2], a[2,sub2], "*g")
axis("equal")
figure(2)
plot(a[1,:], a[2,:], "*k")
axis("equal")
clusterID, itcount1 = admm1(a)
figure(3)
plotresult(a, clusterID)
println("itcount1 = ", itcount1)
nothing
end

mxgau(20, .3, .3, .1)

end

```