I've had several complaint forms go missing while playing and now i have a large amount of biters picketing the pneumatic tube interfaces around my complaints department and no forms to give them.
I've looked everywhere but the forms are just plain gone. I cannot find them anywhere.
I started noticing the lack of forms around the time i was setting up tubes to route the forms to where they needed to go. Maybe they vanished into the pneumatic backrooms?

Here is my save: https://www.dropbox.com/scl/fi/kxxg75wed8ak937gdjrhl/Adminworld.zip?rlkey=gey9kaba2qscml0o5yesow81h&st=jnqj44sj&dl=0

Thanks for the report and the save I will investigate !

Ok found it ! The issue was that when connecting 2 tube networks, paperwork in one of them was disappearing. This is fixed in 0.5.11 and I tried to recover your lost complaints in your save LMK if this worked :)
https://drive.google.com/file/d/1foRNS5tYNs8qZixQyxxDePkE4uLcx5Tn/view?usp=share_link

Loaded the save but whatever you did didn’t seem to do anything to restore the lost paperwork. Also, it seems you did something that massively increased my movement speed and mining speed.
However, the commands that showed up in the console clued me in on the internal names of the complaint items. I had already tried to spawn in the missing forms so i could continue playing without a lot of angry biters in my base but I couldn’t make it work. I tried to spawn in "landscape-complaint" since that is the items displayed name. turns out the thing i needed to spawn in was "ticket-landscape"
Also tested out merging tube networks before and after updating to the new version and can confirm that merging no longer deletes items.

Shoot, I tried meddling with the save without triggering commands to avoid enabling cheats on your save but apparently it's an epic fail. Anyway good new is that the issue is fixed and that you could spawn your missing tickets