Melting research chemical recipe (Stacks)

## Testmerges
#11589: 'byondoidc' by hry-gh at commit 76efa10139
#11660: 'achievement integration' by hry-gh at commit 7cb5df1e1c
#11677: 'Xenomorph on dropship alert now only occurs after landing' by carlarctg at commit 5d4d3c1257
#11636: 'Fix: Cades stacking on top of each other.' by MistChristmas at commit 03c79f5178
#11615: 'Xeno Fire Immunity Refactor x2 + Hive Fire Resistance Buff' by Drulikar at commit e425813335
#10999: 'Fix of various plane related issues' by Blundir at commit f85a7153c4
#11653: 'Rust_g 6.0.0' by Drulikar at commit 9d5cc62999
#11691: 'Fix: M39 Brace still affecting weapons it was detached from' by MistChristmas at commit 4c0ad927d5
#11661: 'Despoiler rework' by Git-Nivrak at commit c0f8d2884f

## Round ID
32464

## Description of the bug
Xenomorphs can melt stacks of paper containing research chemicals recipes, deleting them completely.

## What's the difference with what should have happened?
It was melted, should not have been melted.

## How do we reproduce this bug?
1) Make a stack of research chemical papers
2) Melt as a drone
3) Watch as it is deleted

## Attached logs
```
Prime Drone (AR-592-NI) vomits globs of vile stuff all over Synthesis of Peretotane. It begins to sizzle and melt under the bubbling mess of acid! vomits globs of vile stuff all over Synthesis of Peretotane. It begins to sizzle and melt under the bubbling mess of acid!
Synthesis of Peretotane collapses under its own weight into a puddle of goop and undigested debris!"
```

## Additional details
- Author: SolidFury7
- Admin: the luscao
- Note: None