Guidelines

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Minecraft Version

1.20.1

Mod Version

4.1

Mod Loader

Forge

Mod Loader Version

47.2.0

Describe the bug

A bug happened!

Being near the Wither Storm as it spawns will rapidly inflict Wither Sickness. My personal hypothesis is that it inflicts incredibly high amounts of contacts while spawning in.

Steps to Reproduce

1. Summon the Wither Storm in survival in the intended manner (Optionally, decrease the Application Delay to 12 to see the effects faster without skewing the results.)
2. Run
3. See Wither Sickness

Crash Reports/Logs

Note: I don't think these are of any use...

Is OptiFine installed?

• OptiFine is installed

Screenhots

Mod List

CWSM
JEI

update: it might be LAN and cheats at the same time that prevents it

message (2).txt
Logs, pressed enter to make a new line and it posted instead.

i can confirm that i also had this same issue
it being a problem with the wither's invulnerable state specifically makes sense since i dont remember having this problem when i played on versions before the large lag spike that followed the wither spawning in was fixed, and this lag spike may have allowed people to get far enough away to avoid being instantly infected.

i was doing hardcore runs and decided to just use cheats to get around this bug but i noticed something odd
this bug doesn't seem to happen when the world has cheats enabled, it might just be a coincidence but the pattern remained consistent across about 8 attempts

Maybe this was already patched in a way that used cheats somehow?

New info on this, turns out this applies to all phases and means that getting close to the WS at all immediately starts application regardless of contacts or proximity time.

Found out more info about this from my own testing. It looks like the "contacts" system of getting Wither Sickness is broken. I went into Survival mode during a regular phase 4 chase, and in less than 30 seconds, I had over 200 contacts despite a beam never touching me. This is definitely not supposed to happen, but I won't make a new bug report for it due to it probably being the same thing as mentioned here.

EDIT: On 1.19.4, if that matters.

I've noticed that as well, I played for a few minutes and had over 66. It's probably because of the targeting reworks I did in the update

Will be fixed in the next major release