I have the same issue with version 4.0.14.

For the following code, the tooltip is sometimes visible sometimes not visible, I am checking by refreshing the page.

<Chart
            scale={scaleProps}
            height={chartHeight}
            forceFit={forceFit}
            data={data}
            padding={padding}
            pure
          >
            <Tooltip showTitle={false} crosshairs={false} />
            <Geom
              type="interval"
              position="period*avg"
              color={color}
              tooltip={tooltip}
            />
          </Chart>