I tried both of these and the same issue happened: EARTH ELEMENTAL Large elemental, neutral Armor Class 17 (natural armor) Hit Points 126 (12d10 + 60) Speed 30 ft., burrow 30 ft. STR 20 (+5) DEX 8 (-1) CON 20 (+5) INT 5 (-3) WIS 10 (+0) CHA 5 (-3) Damage vulnerabilities thunder Damage Resistances bludgeoning, piercing, and slashing from nonmagical weapons Damage Immunities poison Condition Immunities exhaustion, paralyzed, petrified, poisoned, unconscious Senses darkvision 60 ft., tremorsense 60 ft., passive Perception 10 Languages Terran Challenge 5 (1800 XP) Earth Glide . The elemental can burrow through nonmagical, unworked earth and stone. While doing so, the elemental doesn't disturb the material it moves through. Siege Monster . The elemental deals double damage to objects and structures. ACTIONS Multiattack . The elemental makes two slam attacks. Slam . Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit : 14 (2d8 + 5) bludgeoning damage. Earth Elemental Large elemental, neutral Armor Class 17 (natural armor) Hit Points 126 (12d10 + 60) Speed 30ft., burrow 30ft. STR 20 (+5) DEX 8 (-1) CON 20 (+5) Damage Vulnerabilities thunder INT 5 (- 3) WIS 10 (+0) CHA 5 (- 3) Damage Resistances bludgeoning, piercing, and slashing from nonmagical weapons Damage Immunities poison Condition Immunities exhaustion, paralyzed, petrified, poisoned, unconscious Senses darkvision 60ft., tremorsense 60ft., passive Perception 10 Languages Terran Challenge 5 (1 ,800 XP) Earth Glide. The elemental can burrow through non magical, unworked earth and stone. While doing so, the elemental doesn't disturb the material it moves through. Siege Monster. The elemental deals double damage to objects and structures. ACTIONS Multiattack. The elemental makes two slam attacks. Slam. Melee Weapon Attack: +8 to hit, reach 10ft., one target. Hit: 14 (2d8 + 5) bludgeoning damage. I made the other Elementals today and a few other monsters and didn't have any issues. Only the Earth Elemental is being difficult.