Wire Links automatically renumbering

We've had a recurring incident where all wire links have automatically renumbered themselves back to the default tags Lxx. This is happened to the same user before on another project. Other uses have also reported similar behavior. 

We typically tag these as 24V+A1, 24V+A2 etc.

Ive confirmed with the user that no pages have been moved or copy and no renumbering (re sequence IDs) has taken place, this has just randomly happened.

Bringing up the "Resequence Wire Link" window, shows Wire Link L19 has wire 919487 connected, however in the background you'll see it has wire 102 connected.

Is anyone able to offer any information on what might be causing this?

I've uploaded a backup of the project to:


Kind Regards