# Delays and lags

**URL:** <https://community.homey.app/t/delays-and-lags/159744>\
**Category:** Questions & Help\
**Tags:** advancedflow\
**Created:** [September 18, 2026, 11:11am UTC](https://community.homey.app/t/delays-and-lags/159744 "2026-09-18T11:11:02Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Peter\_Kawa](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/peter_kawa/32/173848_2.png) [@Peter\_Kawa](https://community.homey.app/u/Peter_Kawa)\
**Post date:** [September 18, 2026, 11:57am UTC](https://community.homey.app/t/delays-and-lags/159744/2 "2026-09-18T11:57:21Z")

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> [@Odd\_Arne\_Danielsen](#):
>
> The motion sensor detects movement immediately – I can see its LED flash – but it can take around 5–10 seconds before the light actually turns on

Homey itself isn’t slowing things down.  
Especially when it’s a wifi sensor, that’s because of it takes a while for the sensor to wake up and restore its wifi connection.

To test if the sensor signal lags, or if the light responses slow, add (timeline) notifications to your flow:

1. When notification arrives during motion detection: light lags
2. When notification arrives when light turn on: sensor lags
3. When notification arrives somewhere in between: both sensor and light lag

You also most probably experience Zigbee / (Matter-over-)Thread interference and mesh issues: (Thread is very similar to zigbee)

> [@Advanced Zigbee Troubleshooting on Homey](https://community.homey.app/t/advanced-zigbee-troubleshooting-on-homey/115930):
>
> If you’re experiencing issues with your Zigbee network on Homey, here are advanced troubleshooting steps to help optimize performance and stability, especially in more complex environments: Power Supply Integrity A stable power supply is critical for Homey’s performance. An underpowered adapter can lead to instability in the Zigbee network. Always ensure you’re using a reliable adapter providing at least 2A. Power fluctuations can cause disconnections or communication failures, especially un…

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