I have two different charts on my page.
I'm adding custom toolbar item for the first one and for the second one.
When I hover over the button on the first chart it displays normal hover effect (e.g. border and yellow background)
But when I hover over the second chart - no hover effect exist - image displaying as usual, but still work.
Why I cannot get the standard hover effect (e.g. border and yellow background) on the second chart for the custom item?
Thanks.