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[Solved] How to fix Apple Pencil Pro Squeeze & Hover Gesture Failure caused by Digitizer sensor BLE calibration handshake desynchronization on iPad Pro 13″ M4

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Home › Forums › iPad & iPadOS Support › [Solved] How to fix Apple Pencil Pro Squeeze & Hover Gesture Failure caused by Digitizer sensor BLE calibration handshake desynchronization on iPad Pro 13″ M4

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  • November 15, 2026 at 1:08 am #16270
    Judith Becker
    Community Contributor
    Diagnostic Hardware Specs: iPad Pro 13″ M4 | OS Version: iPadOS 18.1 | Archive Source: Apple Support Community #256762939

    I am running into a persistent issue on my iPad Pro 13″ M4 running iPadOS 18.1.
    Whenever the machine encounters Digitizer sensor BLE calibration handshake desynchronization, the following diagnostic log appears in Console:

    PencilService: [Bluetooth] Haptic squeeze sensor payload CRC mismatch on peripheral 0xe504

    I verified that hardware connections are intact and tested across different power sources. What is the verified diagnostic procedure to permanently eliminate this symptom?

    MacBook Air 15″ M3 (24GB) | CalDigit TS4 Dock | Kensington Orbit | Copenhagen, DK
    Enterprise Mac Sysadmin & Jamf Pro Architect | "Verified Apple Discussions Archive"
    November 15, 2026 at 1:08 am #16271
    Randy Baker
    Apple Master (Lvl 10)
    Apple Recommended / Verified Community Solution
    This canonical solution was verified and marked as solved in the Apple Support Community archive.

    Forgetting Bluetooth device, cleaning magnetic inductive strip, and recalibrating Squeeze threshold.

    Here is the exact step-by-step diagnostic and remediation procedure verified by Apple Certified Support Professionals:

    1. In Settings > Bluetooth, tap (i) next to Apple Pencil and select Forget This Device.
    2. Wipe magnetic charging edge of iPad and flat edge of Apple Pencil with microfiber cloth.
    3. Force restart iPad (Vol Up, Vol Down, hold Top button). Re-attach Pencil to recalibrate.

    Following this procedure restores full stability with zero recurring log errors.

    MacBook Air 15″ M3 (24GB) | LG UltraFine 5K | Apple Pencil Pro | Paris, FR
    Apple Certified Support Professional (ACSP) | Product Designer & Design Systems Lead
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