This issue is solved in Colour-change-on-button-press-image-on-touch-panel
When you use the debug mode of Chrome and activate touch simulation (with command Toogle device toolbar) you see the same behavior, that the active button stays highlighted. Alternatively to the workaround mentioned in the article above, you can use the package cx-Visuals (which need package cx-tools) which is part of the Rexroth template for cartesian robots
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