As show at the gif above, when the chart is resized until certain size, the chart will suffer non stop resizing bug.
This issue can be triggered easily when left y axis and right y axis are both enabled and both with axis label. The toolbar item just remains display period and display unit.
Based on the observation, it seems like the chart is at the state of hiding toolbar item label when the toolbar width is larger then the chart width and the toolbar was forced to wrapped.
This example is replicated and show at below: