#19890 Mustard Jelly form should protect against nonmagical weapons and level drain

Pantalion

For a laugh, I took a look at Mustard Jelly form's description today.

Special Abilities:
– Hasted.
– Magic Resistance: 100%
– Cold Resistance: 50%
– Electrical Resistance: 100%
– Slashing Resistance: 30%
– Crushing Resistance: 60%
– Piercing Resistance: 100%
– Missile Resistance: 85%
– Immune to nonmagical weapons, charm, confusion, domination, fear, hold, level drain, panic, paralysis, petrification, poison, slay, sleep, and stun.

Checking this out, not only did I manage to punch a polymorphed Jan and deal damage - with an assuredly non-monk CHARNAME, but CHARNAME thus transformed was level drained multiple times against some vampires I console spawned to test it out.

Either the text is wrong, and the Mustard Jelly should not be immune to non-magical punches and level drain, or the text is correct and the Mustard Jelly should be even better than it is already. Either way, 'tis a bug.

Gate70

1. Load the attached save.
2. Have Neera cast Polymorph Self (2 -> F11).
3. Once the spell is cast, transform her into a Mustard Jelly (2 -> F12 -> F5).
4. Have Abdel punch Neera (1 -> F2 -> 2).
5. Wait for Abdel to hit Neera.

*Observed*
Neera takes damage.

*Expected*
A weapon ineffective message should be produced.

6. Have Neera move the other side of the northern door (Ctrl/j).
7. Wait for a vampire to attack Neera.

*Observed*
Neera is level drained.

*Expected*
Polymorphed characters should not be level drained.

*Note*
Strref 100375 says "Immune to nonmagical weapons, .... level drain .....".