Restyle in a zoomed 3D state sometimes changes the zoom level

[ksze]

When using Scatter3D, sometimes if the plot is restyled while it is in a zoomed state, the zoom level is spontaneously changed; sometimes a little, sometimes a lot.

To reproduce:

1. Visit this codepen: https://codepen.io/k_sze/pen/WXgNoJ
2. Zoom the plot a little bit using your mouse wheel; You can zoom in or out;
3. Open codepen's console and run the restyle() function;
4. Watch the plot's zoom level get changed spontaneously.

You may need to repeat steps 2 and 3 a few times.

Not sure if it's related to #346 and the fix in #351.

[etpinard]

Ha. There must be some rounding error when converting to the eye/up/center vectors of the layout.scene.camera attribute on vice-versa.

Thanks for the report.

[kirsan31]

@etpinard I think it's not rounding errors any more.

As for now It's became very ridiculous bug. It's not random zoom reset, now it's absolutely predictable zoom reset - one zoom step back.
Examples:

1. Change ZoomLvl from 0 to 1
2. restyle()
3. ZoomLvl reset to 0

1. Change ZoomLvl from 0 to 1 and then to 2
2. restyle()
3. ZoomLvl reset to 1

So, to zoom to level N, now we need to zoom to N+1, because after restyle it will be reset to N.

You can test this behavior on @ksze codepen from 1 post.

----UPD----

It's not only restyle problem. This is whole plot problem with zooming only by mouse wheel. Instead of restyle you can click on any plot control buttons and zoom will 1 step reset.
I figured out that plot will remember zoom lvl only on second interact with it. It can be second zoom, or mouse click in plot area.

----UPD2----

I figured out that this is separate issue - will open a new one...

[nicolaskruchten]

Thanks for the bug report! I think it might be related to #5050 and/or #5005

[creinarz]

Has this issue been solved? I am using plotly 5.6.0 and still have this problem.
Thanks!

[Dmitriymush]

Same thing for me, when data is being constantly updated (like 1 sec in period) it's really huge problem.