Why do several of the selected vectors Move when grouped?

[edee]

Win10/ADv2

This is driving me nuts. 
I select several different curves or groups to group into a bigger group. I hold down ctrl + G and suddenly a piece that I was trying to group goes flying away from the group. It does group, but it moves up. Sometimes just an inch or so, other times it moves right off the artboard. 

It happens so often I've been able to capture it several times. 

How do I get it to stop? 

 

 

 

[firstdefence]

Never experienced that before, any chance of getting our hands on this file?

[lepr]

Ancient bug. When grouping objects that are already members of different rotated Groups, the transform mathematics is not correctly calculated.

Working around it is a matter of cutting an object from its containing Group and pasting inside the containing Group of another object.

[edee]

@firstdefence

Thank you for your response. It happens in nearly every file I am working in now. The thing is, if I close and reopen the same file, it may not do it. Sometimes just deselecting and reselecting all the same parts will give a different result. 

@,,,  (for some reason, I am not seeing the members username or image)
Thank you for your response. That makes sense. Now I think about it, it could be parts from different groups where I have rotated part of a group using the 'transform origin' feature (that icon that looks like a target). Do you know why it only happens sometimes using all the same bits? It's not important really, more curiosity. 
If I close that file and reopen the file, select the same bits, it may group perfectly. Just deselecting all the bits and reselecting all the same bits may stop it from happening - probably 50% of the time. 

Thank you both. 

 

[lepr]

20 minutes ago, edee said:

@,,,  (for some reason, I am not seeing the members username or image)

That's correct. My username is three commas and my avatar is blank.

24 minutes ago, edee said:

[...]

Do you know why it only happens sometimes using all the same bits? It's not important really, more curiosity. 
If I close that file and reopen the file, select the same bits, it may group perfectly. Just deselecting all the bits and reselecting all the same bits may stop it from happening - probably 50% of the time. 

I've not studied the phenomenon very closely and I rarely work in a way that it will manifest. Hopefully, someone more experienced will join the discussion with explanations for you.

 

[edee]

14 minutes ago, ,,, said:

That's correct. My username is three commas and my avatar is blank.

 

Oh I am going to steal that 😆  But I think I'll use +++ or !!! 

Thanks again. 

[debraspicher]

6 minutes ago, edee said:

Oh I am going to steal that 😆  But I think I'll use +++ or !!! 

Thanks again. 

You should use quotes so when people have to quote you, they must use quotes...

[StuartRc]

I have been experiencing something similar recently. Not sure of the direct cause but I have been thinking it is something the do with the relative positions in the layers panel. You could try:
Select the groupings and copy paste so that they are adjacent to each other in layers. Then regroup to see if solves it
Could be to do with artefacts
Could be to do with orientation

A similar issue occurs when you can no longer draw on a raster object outside a bounding box Or When jumps occur when trying to group mixed (Raster | Vector objects). In this case I just rasterize the object!

 

[thomaso]

4 hours ago, debraspicher said:

You should use quotes so when people have to quote you, they must use quotes...

«My username is "three commas" and my avatar is "blank"» said ",,," to "tripple dot" and inspired "plusplusplus" to make "HYPHENHYPHEN" requesting "Call My Name". As usual, "NotMyFault" felt innocent and pointed to "whoiswho". «Who cares?» asked "¿".