riot's silence speaks volume
Zyra's plants are not targeted skills. Nowhere in the list below from patch 8.2 is Zyra listed.
Zyra's plants are autonomous pets.
Shaco's jack-in-the-box are also autonomous pet and it does not draw minion aggro onto Shaco.
I have tested both champions in practice tool: with Shaco's jack-in-the-box and Zyra's Plants from her W or Passive; turned into THORN SPITTER or VINE LASHER attacking enemy champion --
Zyra's plants are drawing minion aggro onto her when it should not.
Shaco's jack-in-the-box did not draw minion aggro onto him.
Riot needs to fix this or comment here to say that it is intended.
This problem started from patch 8.12 and still current in 8.14. Since patch 8.2 when the change was made and up to patch 8.11 Zyra's plants did not draw minion aggro onto her.
Affected abilities that draw minion aggro (and SUMMONER SPELLS
Smite,
Ignite)
AKALI Q - Mark of the Assassin & R - Shadow Dance
ALISTAR W - Headbutt
ANIVIA E - Frostbite
ANNIE Q - Disintegrate
BRAND E - Conflagration & R - Pyroclasm
CAITLYN R - Ace in the Hole
CASSIOPEIA E - Twin Fang
CHO'GATH R - Feast
DARIUS R - Noxian Guillotine
DIANA R - Lunar Rush
ELISE (HUMAN & SPIDER FORM) Q - Neurotoxin/Venomous Bite
EVELYNN E - Whiplash
FIDDLESTICKS W - Drain & E - Dark Wind
GAREN R - Demacian Justice
IRELIA E - Equilibrium Strike
JANNA W - Zephyr
JARVAN IV R - Cataclysm
JAX Q - Leap Strike
JAYCE (HAMMER FORM) Q - To The Skies & E - Thundering Blow
JHIN Q - Dancing Grenade
KARMA W - Focused Resolve
KASSADIN Q - Null Sphere
KATARINA Q - Bouncing Blade & E - Shunpo
KAYLE Q - Reckoning
KHA'ZIX Q - Taste Their Fear
LEBLANC Q - Shatter Orb
LEE SIN R - Dragon's Rage
LISSANDRA R - Frozen Tomb
LULU ENEMY E - Help, Pix!
MALPHITE Q - Seismic Shard
MALZAHAR E - Malefic Visions & R - Nether Grasp
MAOKAI W - Twisted Advance
MORDEKAISER R - Children of the Grave
NAMI W - Ebb and Flow
NOCTURNE E - Unspeakable Horror & R - Paranoia (second cast)
NUNU E - Ice Blast
OLAF E - Reckless Swing
PANTHEON Q - Spear Shot & W - Aegis of Zeonia
POPPY E - Heroic Charge
QUINN E - Vault
REK'SAI E - Tunnel
RYZE W - Rune Prison & E - Spell Flux
SEJUANI E - Permafrost
SHACO E - Two-Shiv Poison
SINGED E - Fling
SKARNER R - Impale
SWAIN E - Torment
SYNDRA R - Unleashed Power
TALON Q - Noxian Diplomacy
TEEMO Q - Blinding Dart
TRISTANA R - Buster Shot
TRUNDLE R - Subjugate
VAYNE E - Condemn
VEIGAR R - Primordial Burst
VI R - Assault And Battery
VIKTOR Q - Siphon Power
VLADIMIR Q - Transfusion
VOLIBEAR W - Frenzy
WUKONG E - Nimbus Strike
XIN ZHAO E - Audacious Charge
YASUO E - Sweeping Blade & R - Last Breath
ITEM ACTIVES:
Bilgewater Cutlass,
Blade of the Ruined King, and
Hextech Gunblade Active
SUMMONER SPELLS
Smite,
Ignite.