HAIL type Projectile not impacting

[ErminioLucente]

It seems like some projects on rare occasions do not impact the ground and just get stuck, or fly along the floor without inertia set.
The projectiles do respect gravity/fall acceleration even if in the video it appears to float.

its been confirmed that PROPERTIES = STRENGTH_BASED REBOUND_IMMUNE is the culprit.

This video demonstrates the issue.

2024-04-19.19-33-05.mp4

This video demonstrates it in possession mode.
It consistently does this if autoaim/PRIMARYTARGET is set, it does NOT do it if this is set to 0.

3.mp4

[ErminioLucente]

Here is my SHOT set up

**[shot55];ACID_SPRAY_FUNCTION
NAME = ACID_SPRAY_FUNCTION
ANIMATION = POISON_BUBBLE
ANIMATIONSIZE = 100
ANIMATIONTRANSPARENCY = 2
SIZE_XY = 64
SIZE_Z = 64
DAMAGE = 6
HEALTH = 50
HITTYPE = 3
AREADAMAGE = 1 0 0
FIRELOGIC = 3
EFFECTAMOUNT = 2

SPEED = 180
SPEEDDEVIATION = 80
EXPLOSIONEFFECTS = -121 -130 0 0

SPREAD_XY = 120
SPREAD_Z = 60

FIRINGSOUND = 26

FALLACCELERATION = 22
UPDATELOGIC = 0

DESTROYONHIT = 1
HITCREATURESOUND = 181
PROPERTIES = STRENGTH_BASED REBOUND_IMMUNE**

[Loobinex]

After a bit of investigation, I think this is because it sets TMvF_Unknown10 in thing_fire_shot here:

        if (((shotst->model_flags & ShMF_StrengthBased) != 0) && ((shotst->model_flags & ShMF_ReboundImmune) != 0) && (target->class_id != TCls_Door))
        {
          flag1 = true;

That makes it a duplicate of this issue: #2811