We are definitely not alone. A lot of users having similar problems in this thread: Homey keeps going offline since 3 update days ago - #11 by Timmm
I have also noticed a difference in uptime between different USB power supplies and USB-cables. Also that with the USB- ethernet adapter the Homey crashes faster than on wireless.
I’m waiting for a Ugreen 30W USB 5V/3A charger and a Ugreen USB-C cable from Amazon tonight. I will report back on the results.
However, all this is not because everybodys chargers and cables suddenly stopped working but from an “updated” firmware from Homey. I hope they see all this and releases a fix soon.