Enhanced Input Gesture keys (Pinch/Rotate/Flick) never release after touch ends — regression in 5.8

POST LINK: https://forums.unrealengine.com/t/enhanced-input-gesture-keys-pinch-rotate-flick-never-release-after-touch-ends-regression-in-5-8/2745006

POST BODY:

• Summary
  An Input Action mapped directly to a Gesture key (e.g. "Pinch", EKeys::Gesture_Pinch)
  keeps firing the Triggered event every frame indefinitely after all fingers are lifted
  from the screen.

Cause:

• In 5.8 the gesture keys became analog (FKeyDetails::Axis1D added in InputCoreTypes.cpp,
  ~line 753); in 5.5 they were Gesture-only, so IsAnalog() was false.
• On release, UPlayerInput::InputGesture stores the last (non-zero) value into RawValue
  instead of 0, and gesture keys lack UpdateAxisWithoutSamples, so RawValue never decays.
• UEnhancedPlayerInput's "analog inputs pulse every non-zero tick" rule then treats the
  stuck RawValue as held every frame, so the default Down behavior stays Triggered.

Fix (any one):

• Zero RawValue on IE_Released in UPlayerInput::InputGesture; or
• Add UpdateAxisWithoutSamples to the gesture keys; or
• Remove Axis1D from the gesture keys (restore 5.5 behavior).

• What Type of Bug are you experiencing?
  Gameplay

• Steps to Reproduce
  1. Input Action IA_Pinch (Axis1D), no Triggers, no Modifiers.
  2. Map it to the "Pinch" gesture key in an IMC.
  3. Log its Triggered / Completed events.
  4. Do a two-finger pinch, then lift all fingers.

• Expected Result
  Triggered stops and Completed fires after release (as in 5.5).

• Observed Result
  Triggered keeps firing every frame forever; Completed never fires.

• Affects Versions
  5.8

• Platform(s)
  Windows

POST AUTHOR: shari_di

CREATED AT: 08/19/2026 07:43 AM EDT

UPDATED AT: 08/20/2026 12:34 AM EDT