LogMeIn (LMI) apparently currently does not support wake on LAN (WoL) functionality for any computer which uses "Modern Standby". Here's a link to Microsoft's website for some background info. A...
I am seeing the same issue, the wake function from the LogMeIn Client sent to some target Dell machines no longer works (nor does it on a handful of Lenovo V520 devices and one HP deskpro model) despite there being other active machines with the LogMeIn controls in the remote network.
The WoL feature in the client routers however is able to send such a signal to all these affected devices and trigger them to start back up.
This suggests something is not working in the LogMeIn Client program when used as an admin support tool, ideally could this not be fixed to use both the current process and to trigger other machines in the remote network to send a standard WoL packet so that the "best of both worlds" approach would ensure the target machine starts back up.
Currently the extra steps in having to remotely connect and send this info is time consuming and such a feature would be really good to have restored to full functionality on all hardware platforms.