There is a workaround if needed.
Override tootltip behavior
msg.payload = [{
"series": ["КСЦ", "Скорость/100 км/ч"],
"data": [dat,speed],
"labels": lab, lab
}]
msg.ui_control = {
options: {
tooltips : {
mode: 'x-axis',
position: 'cursor'
}
}
}
return msg;