Removing and Adding widgets are not recommended and is used as a workaround to animate UIs
Also, it is in fact one of the first workarounds that the community discovered (this includes me), but, today we have much better ways of animating UIs without relying on removing and readding it to screen, such as invisible color blocks being used as paddings…
Also, never forget to use Delta Time when working with timings, to account for server lag and any edge cases of performance changes, including programming language processing speed.
If verse runs at 30TPS or at 340TPS should not matter if you properly use DeltaTime to bridge the difference 
That’s used on any other programming languages, including game dev scenarios for the same reasons 