Map missing quests - boss fire resistance

Hi everyone, i am writing here to report 2 bugs / weird encounters

1. maps don't spawn rituals (level 15, 2 tablets, 1 tablet with ritual) as you see from the image attached, they rituals spots are no where.
https://imgur.com/a/3eajeMF


2. tl. dr.
- map bosses feels way more resistance to fire dmg (explosive grenade) then poison (gas grenade) dmg compared to last patch
- last patch i was melting the bosses with fire dmg, and a bit slower with poison
- now, with same dps i kill as fast as before with poison (gas grenade), but way slower then with main fire skill (explosive grenade) then before.
- i looked in the patch notes, didn't noticed anywhere changed something about the it
- the mobs die like before when using exploding grenade

Long story
this one maybe is not a bug and is a new way of calculating the bosses fire resistance?

my char is a exploding grenade build with 90 k dps (according to the tool tip).
last update i was able to melt the bosses with no problem.

now, the weird thing is that, with gas grenades (9 k dps - i know there are way more multipliers behind) i kill the bosses as fast as last patch, but still faster then the my main fire dmg explosive grenade, like somehow the fire resistance was improved on bosses.
both skills are level 28

the mobs dies as fast / usual

thank you for reading