Color legend always shows up in bottom left corner when exporting to EPS or PDF

From a comment posted to https://blog.kitware.com/color-legend-improvements-coming-to-paraview-5-4/:

With v5.4, whenever I export a scene in for example, eps or pdf format, the color legend is automatically placed in the left bottom corner, even though I had placed somewhere else. It is fine for png or jpg though.