Helstrum (Robotic companion weapon) is not affected by flight speed mods (Terminal Velocity)

[Kourinn]

TYPE: In-Game
DESCRIPTION: The Helstrum Robotic companion weapon is unaffected by "+XX% Flight Speed" mods (Terminal Velocity). Rockets fired have the same travel time for the same distance with and without "+XX Flight Speed" mods equipped.
VISUAL: N/A
REPRODUCTION:

1. Equip the following:
   1. Warframe Primary: Any sniper rifle (Rubico) to measure distance.
   2. Robotic companion: Djinn
      1. Mod Djinn with max rank Thumper
   3. Robotic weapon: Helstrum
      1. Mod Helstrum with max rank Terminal Velocity
2. Enter Simulacrum.
3. Kill all spawned enemies and summon 1 Corrupted Heavy Bombard with "PAUSE AI" checked.
4. Wall jump or aim glide ontop of the left, closest-to-player-spawn pillar (~50m from spawned enemy).
5. Record and measure time between each Helstrum rocket launch and enemy impact.
6. Repeat 1-5 without modding Helstrum with max rank Terminal Velocity.

EXPECTED RESULT:  Modded rockets travel 60% faster (modded to 16m/s for 3s flight time; from un-modded 10m/s for 5s flight time).
OBSERVED RESULT: Fired rockets travel 10m/s (for 5s flight time at 50m) with and without Terminal Velocity equipped.
REPRODUCTION RATE: 100%

I tested other projectile companion weapons (Vulklok, Burst Laser, etc) but they DID change with flight speed mods. Of the weapons I tested, only Helstrum has this bug.

[(PSN)JaiWilliams767]

Monday, August 2021

Issue persists. Bug remains unfixed.

I'd like to add that with a +projectile flight speed riven mod the bug is present, hence the issue is with the weapon's interaction with flight speed and not the mod terminal velocity itself.