Just wondering, is it a known bug that hover text in heatmap chart sometimes appears without background? More precisely, the svg path for hover text container is not calculated correctly: d=“M0,0L6,6v-3h6v-6H6V-6Z”, and appears as a small arrow, see below:
When displayed correctly, it looks like this:
The bug appears in Firefox only (using FF 55.0.3 on Mac OSX with plotly 1.28.2), It does not show in Chrome or Safari. Please, let me know if you’ve seen this bug before or know what might be causing it?