I have been killed in Felucca while hidden inside my house. This was around Halloween but the problem remains.
If inside a house hidden or away from open windows or doors or any type of breach would be considered not in line-of-sight
Being able to damage players using WildFire while in a house or hidden.
https://uo.com/wiki/ultima-online-wiki/skills/spellweaving/
Meanwhile... Earthquake will harm hidden players but still requires line-of-sight.
http://www.uoguide.com/Earthquake
*Rasberry!*
If inside a house hidden or away from open windows or doors or any type of breach would be considered not in line-of-sight
Being able to damage players using WildFire while in a house or hidden.
https://uo.com/wiki/ultima-online-wiki/skills/spellweaving/
http://www.uoguide.com/WildfireDoes not damage hidden characters.
The caster must have line of sight to the target(s) in the field in order for them to be damaged.
Meanwhile... Earthquake will harm hidden players but still requires line-of-sight.
http://www.uoguide.com/Earthquake
https://uo.com/wiki/ultima-online-wiki/skills/magery/magery-spells/The earthquake spell requires the caster to have line of sight to the target. Will damage hidden targets.
Can hit multiple targets within its effective radius, with no limit, including hidden targets, as long as the targets are in sight of the caster. Cannot damage targets with no line of sight.
*Rasberry!*