Hmm now that you mention it, my Homey was unresponsive this morning… (Homey becoming unresponsive it something that happens regularly for me, especially when I’m working on an app and very regularly running homey app run, but that wasn’t really the case this morning). I don’t have the LEDring Collection app installed.
Athom recommended the same what @martijnpoppen described but the update to Homey 8.1.2 solved the problem, too.
Athom said, it could be a problem with my zigbee network.
When I was facing similar problem, I was using trigger eg. “Temperature changed”, “Power changed” for Zigbee devices. After I removed/replaced it with rather time based condition, never had this issue again. Also “…has become more/less” works ,but I have feelings that it gets skipped when eg. you put condition 10C but it jump from 9C to 35C in one shot, or you specify 100W as limit and the power changed to 4000W it was somehow not reliable for me. Please note I have 72 Zig-bee devices… “over the edge”
Ups, sorry, I was checking that 3 years old ticket with Athom I had opened for 1 year with them - it was as I wrote, but it was caused actually by ZWAVE device - later on I have found out that the device sends way too many traffic compared to other ZWave devices - anyway, switching the triggers helped for me and since that time I’m basically using approach above, despite that the device still is much more active then the others (energy meter) - look on Rx packets. Yet, it could be similar with any other device in connection to those conditions and/or triggers being triggered way too often eg. by crashing (I believe Athom have a memory leak there but I’m not developer) . Good luck with that, hopefully you will find the culprit.