# SYSTEM ONE + Serato DJ Pro: SCROLL/LOAD encoder press unresponsive after laptop interaction until encoder is rotated
**URL:** https://community.enginedj.com/t/system-one-serato-dj-pro-scroll-load-encoder-press-unresponsive-after-laptop-interaction-until-encoder-is-rotated/69996
**Category:** Standalone Controllers
**Created:** [July 14, 2026, 11:02am UTC](https://community.enginedj.com/t/system-one-serato-dj-pro-scroll-load-encoder-press-unresponsive-after-laptop-interaction-until-encoder-is-rotated/69996 "2026-07-14T11:02:12Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@truestorey](https://community.enginedj.com/u/truestorey)
#### Post date: [July 14, 2026, 11:02am UTC](https://community.enginedj.com/t/system-one-serato-dj-pro-scroll-load-encoder-press-unresponsive-after-laptop-interaction-until-encoder-is-rotated/69996/1 "2026-07-14T11:02:12Z")
**Setup:** Rane System One (Engine OS 5.0.3), Serato DJ Pro 4.0.9, MacBook Pro M2 Pro, macOS Tahoe 26.5.2, direct connection via included locking USB-C cable, no hub.
**Steps to reproduce:**
1. Connect to Serato DJ Pro, set System One source to Serato
2. Browse and load tracks from the hardware SCROLL/LOAD encoders — press-to-load works normally
3. Interact with Serato on the laptop (mouse click, trackpad scroll, or keyboard)
4. Return to the hardware and press the SCROLL/LOAD encoder **without turning it first**
**Expected:** Selected track loads to the deck. **Actual:** Press does nothing. Rotating the encoder any amount restores press-to-load immediately.
**Notes:** Consistently reproducible after laptop interaction; never occurs during hardware-only browsing. Appears to be a browse-focus sync issue between the Serato library cursor and the hardware selection state, similar in behavior to the previously acknowledged DDJ-SZ load-knob bug.
**Notes:** Consistently reproducible after laptop interaction; never occurs during hardware-only browsing. Appears to be a browse-focus sync issue between the Serato library cursor and the hardware selection state, similar in behavior to the previously acknowledged DDJ-SZ load-knob bug. DJ Pro 4.0.9, MacBook Pro M2 Pro, macOS Tahoe 26.5.2, direct connection via included locking USB-C cable, no hub.
**Steps to reproduce:**
1. Connect to Serato DJ Pro, set System One source to Serato
2. Browse and load tracks from the hardware SCROLL/LOAD encoders — press-to-load works normally
3. Interact with Serato on the laptop (mouse click, trackpad scroll, or keyboard)
4. Return to the hardware and press the SCROLL/LOAD encoder **without turning it first**
**Expected:** Selected track loads to the deck. **Actual:** Press does nothing. Rotating the encoder any amount restores press-to-load immediately.
**Notes:** Consistently reproducible after laptop interaction; never occurs during hardware-only browsing. Appears to be a browse-focus sync issue between the Serato library cursor and the hardware selection state, similar in behavior to the previously acknowledged DDJ-SZ load-knob bug.
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### Author:  [@SlayForMoney](https://community.enginedj.com/u/SlayForMoney)
#### Post date: [July 14, 2026, 11:29am UTC](https://community.enginedj.com/t/system-one-serato-dj-pro-scroll-load-encoder-press-unresponsive-after-laptop-interaction-until-encoder-is-rotated/69996/2 "2026-07-14T11:29:49Z")
Hi, this seems like an obvious Serato bug for them to resolve, are you posting it here to make other Rane System One users be aware or?