Solved in the newest versions of kaleido and plotly (kaleido 1.0.0 and plotly 6.2.0), but figure sizing is broken now. If you were using smth along the lines of

fig = go.Figure(width = 1920, height = 1080)
fig.write_image('fig.png')

Now you'll have to transition to

fig = go.Figure(width = 1920, height = 1080)
fig.write_image('fig.png', width = figure.layout.width, height = fig.layout.height)