My main use-case is for testing custom integrations and the biggest pain point right now is that the custom fields numbering is not preserved when you create a sandbox.  Having the customfield numbers match is essential for us to test out existing integrations without having to re-write them.  The whole point is to test that the integration will work on production, and if we need to make changes between the two deployments, it isn't really a valid test.

Hurry up Atlassian - this is stealing otherwise productive time from teams globally (and their support partners). 

This would be really nice to have. Does not need to copy over all production data but maybe have the ability to update certain projects on a weekly basis rather than having to keep going back and copying all production data over.

Conversely,
I would rather protect certain projects in sandbox from being overwritten if a lot of development work has taken place in them but not yet rolled out to production.

Our ICT team regularly re-sync sandbox but this, obviously, overwrites automations, workflows, transition conditions and all sorts.

Perhaps, when a sync is performed a backup could be kept in another area so that developers can copy or export configurations back into sandbox.

I know there is now add-ons that do this like Revyz CMJ for Cloud or Revyz back up and restore but this is something that should be native. Admins don't want to build in production as we been doing for years now. We need a place to build and deploy. We need SDLC around Atlassian products.

I would want the option to schedule a restore on a weekly basis as well.

For us, we'd like to be able to pull/refresh configuration data (projects, workflows, roles, permission sets, etc.) back and forth, but /not/ raw data (tickets, users, etc). This is because we do not want most users to have sandbox access, and we do not want to have to manage tickets in sandbox, but we do want to be able to test configurations there, and then promote the config.

Given this is low priority, I'm thinking birthday cake around 2036

Anyone assigned this? Asking for a friend...

Please make it so we can schedule a 'sandbox refresh' that will automatically pull production Jira data to our sandbox. We used to run datacenter Jira on prem and Sunday night we cleaned out the sandbox and restored it from the production data through an automated process. Having this automatic process will greatly improve our satisfaction with Cloud Jira and sandboxes.