Heya! I've been trying to level some of the crafters on my second character, i've been slaying clay golems for a long time and the shale golem did not spawn. I raised my eyebrow because I maxed out the ixal on my main already and i never had this problem, so I began troubleshooting.

I only managed to get it when i removed my angel wings! Which leads me to think that 6.4 combat accessories must interfere with quest enemy spawns that require killing weaker ones to spawn. So I thought i'd point that out!

I did the same thing on my main with her diabolos wings out and yep! Same result, the shale golem doesn't spawn if wing accessories of any type are active when you fight the lv28 clay golems, it prevents spawn.
I have yet to try if it does the same thing with other quests with monsters that spawn the same way as these, but this is was still worth mentioning i believe!

Date & Time: monday may 29th 2023, 8-9pm server time
Frequency: every time a wing accessory is worn in combat
World name: Famfrit, Primal
Character name: Gengetsu Lotusland/Remilia Scarlet'
Monster name: Clay Golem/Shale Golem
Class/Level: RDM, lv90
Party or solo: Solo
Area and coordinates: North Shroud, Alder Springs, circle area around x18 y28
Steps:
1. Accept Daily Ixali quest "What evil lurks in the heart of golems"
2. Slay clay golems wearing any kind of wing accessory
3. Result: The shale golem will not appear until you remove it.