Realtime Preview makes rulers and objects disappear when moving
In Illustrator 24.1 the real time editing feature makes guides or other objects that have no fill or stroke or an object with a white fill and no stroke disappear when moved.

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Iain commented
If guides are disappearing when dragged, change from in views, first option in list, change "View using GPU" to "View using CPU"
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Anonymous commented
New update issues with the path guide from the ruler. Paths disappear or are not able to be pulled from the ruler.
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Confirm. These should be visible.
Also vote for the related request:
https://illustrator.uservoice.com/forums/333657-illustrator-feature-requests/suggestions/40541512-add-an-option-to-show-edges-when-art-is-dragged-wi -
Someone75 commented
Thhis is NO idea. It's a BUG!
Illustrator CC 24.1.2
Guide line will disappear with "drawing in real time" option in preferences activated while one will drag it. Deactivating this great , new "feature" will make it work again.
So the new SUPER DUPER feature is just as buggy as the whole software, still.
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Luís Camacho commented
I came here to post exactly about this. Objects without fill and stroke are invisible during moves.
As for white objects without strokes, they're not really invisible, but since they're a fully white object against a fully white page you can't see them while moving... but you'll see them if they go over a coloured area such as the slug.The attached video shows both issues happening. The solution for this is simple, while dragging an object the edges should always be visible.
Thanks!