Segmenting together causes interacting segmentations and freezing site

[NevMagi]

Is it a [X] bug report or a [ ] feature request?

Current behaviour

When using BrainBox together with an intern last week, we experiences frequent freezing of the site. We primarily used the handdraw and -erase tools, but also occasionally the bucket tools. Although we are working in different layers (Cerebellum_lab and lobule_nele respectively), in different specimens, our segmentations interact: i.e., when one person erases, it may erase parts of the other person's segmentation. Often, refreshing solves the problem, but sometimes segmentations are actually altered. The refreshes are also frequently necessary; and sometimes the site would be completely unresponsive and would need exiting altogether to work again.

Thanks for checking it out!

• If this is a bug, please explain how to reproduce the problem
  • Which tools did you use in which sequence?
  • Is the error concerning a text or a volume annotation?
  • Which label set has been used for the volume annotation (if applicable)?
  • What is the type and resolution of your data? (Can you provide a link to your data?)
  • Do not include sensitive information.
  • Upload the browser error message if you are familiar with web developer tools.

Version information (for bug reports)

• Chrome Version 99.0.4844.84:
• **macOS BigSur Version 11.4 (20F71)*: