You have two problems - under-voltage AND throttling / overheating.
Now looking on your temp, it’s 70C - at 80C or 85C throttling occurs.
Can you share from insights your 1m CPU utilization ? On the screenshot I see 84%, 48% 5min average…this is quite high.
Also, when you look on your Homey, isn’t it close to some other appliances, which might heat your Homey ? Just idea.
How many apps and devices you have ?
You may find out using this script : [Homey Pro] overview script
