Hello @Fair_Trader ,
I was just able to add those elements (and subsequently take them away to avoid overwriting your work) without any issue, so it's possible that there's some kind of connectivity interference between your device and our editor. When you have the chance, I'd suggest trying some connectivity troubleshooting, such as disabling plugins/extensions or clearing your browser's cache, to see if those alleviate your issue with the floating block icons. If the issues persist, please let us know and we'll continue troubleshooting.
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