• what version of Makie are you running?
  [ee78f7c6] Makie v0.24.6
• can you reproduce the bug with a fresh environment ?
  Yes
• What platform + GPU are you on?
  AMD X86_64 and AMD RDNA
• Which backend are you using?
  CairoMakie
• Please provide an minimal example of the failing code. If the problem is with the visualization, please provide a picture or video of it.

I have the following:

function convert_arguments(::Type{<:Heatmap}, fc::FMRIConnectivity)
    [S.Heatmap(fc.mat)]
end

If I do

fig = Figure()
ax = Axis(fig[1, 1])
heatmap!(ax, conn)
ax2 = Axis(fig[1, 2])
heatmap!(ax2, conn.mat)
fig

the result is the attached figure. There is no whitespace. In the Discord I have been told it's because xautolimitmargin is not applied. If this is intended, just close this report.