This is normal, Powerline 500 automatically switch to sleep mode if no activity is detected. When a signal is detected on the Ethernet port, the Powerline 500 will turn back on. It may take a few seconds for a Powerline 500 in standby mode to detect a new activity and turn back on.
The automatic power saving mode reduces your consumption by up to 85%.
V – I receive Internet via fibre, is a Powerline 500 suitable?
A Powerline 500 is sufficient, but it will not allow you to benefit from all the potential speed offered by your internet service provider. If you want a powerline network that matches your fibre optic speed, you must ensure that your electrical installation complies with standards and use powerlines equipped with Gigabit ports. Powerlines 1000, 1200, 1300 or 2000 are equipped with them.