# High CPU Spikes about Every 2 Hours & Persistent Unknown Zigbee Nodes after Network Reset **URL:** \ **Category:** Questions & Help\ **Created:** [July 27, 2026, 5:15am UTC](https://community.homey.app/t/high-cpu-spikes-about-every-2-hours-persistent-unknown-zigbee-nodes-after-network-reset/157602 "2026-07-27T05:15:49Z")\ **Posts on this page:** 1\ **Showing post:** 12
**Author:** ![Dominic\_Gutleben](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/dominic_gutleben/32/121387_2.png) [@Dominic\_Gutleben](https://community.homey.app/u/Dominic_Gutleben)\ **Post date:** [July 30, 2026, 6:09pm UTC](https://community.homey.app/t/high-cpu-spikes-about-every-2-hours-persistent-unknown-zigbee-nodes-after-network-reset/157602/12 "2026-07-30T18:09:14Z")
Exactly. I log in, choose my account, and then I can’t select a Homey at all. I’m caught in an endless loop and can’t reach support. One additional question: Is there no easy way to make local backups? Like downloading the cloud backup, for example? Do you guys always install all updates immediately, or do you keep your system running on a stable version for quite a while? Also, with the online backups, is it possible to go back further than the last 7 days? PS: Since yesterday’s update, the CPU usage seems to be back to a max of 40-50% - so I guess it was an update? --- _[View the full topic](https://community.homey.app/t/high-cpu-spikes-about-every-2-hours-persistent-unknown-zigbee-nodes-after-network-reset/157602)._