Sometimes when I open notes on a task the icon do not show and I would need to hover up and down a few times until they do. I am talking about the pencil and the bin, Tx
What browser are you using, do you have any extensions installed?
I am using chrome and yes I have a ton of them installed.
I'd try disabling them, and see if it continues. If it does not, turn them on one by one to see which could be causing the issue.
That being said, I'd try clearing the cache and offline data for Chrome first and see if it continues afterwards.