Lag and hitching (performance issues) leading to crashing

i have had a pretty smooth league so far, i do not use MTX until i reach maps usually, and my PC is on the higher end of things; today i ran a map and encountered a crash i do not encounter usually, and sounds like some of the crashes others seem to be having recently


Details on problems you're experiencing, and if it's occurring when certain skills are
being used.
Map: Racecourse
League: Affliction
Character: DazedandTazed
Skill: Crackling Lance
Event: part 2 of the map, expedition encounter, once i had detonated and started the event, my F1 reported a very high white marker and it froze, on that frame. blood from the Beastmaster body armor effect ( blood burst on kill) floated in the air above the fight and forced a crash. a second attempt on the map and the hitching (stopping on a frame) continued until Ii removed the cosmetic, allowing me to finish the expedition event fully. clearing the map afterwards caused no issues.
Expectation: some effects overlapping in memory, causing incorrect calls and requiring it to be sorted out before the next frame.... good luck if that's the cause >>

Computer specs: CPU, GPU, RAM.
CPU: i7-9700k @ 3.60 GHz
GPU: Geforce GTX 1080ti 19GB GPU memory
RAM: 16GB 2133MHz, 10.7 in use
M.2 drive SSD

Game Settings: Renderer, Triple Buffering, Multithreading, etc. And if changing any of these helps.
Renderer: Vulkan
Trip Buff: Enabled
Multithreading: Enabled
Textrure: Med, 4x Anisotropic
VSync: fast
Dynamic culling/res: Enabled

Videos or screenshots of your client when it's happening, with performance graphs on (F1 in-game).
i wish i had shadow on, sorry