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Products: TL-PA4010PKIT(UK) ver 2.1
Firmware: 1.1.0.844-01-20120919-FINAL

I have four adapters configured to as a network group, using my network name and not the default "HomePlugAV".

For most of the time this works well. However, I have noticed that at times I lose access to parts of the network, typically manifesting as one of:
- No Internet access
- Printer not online

Investigations using the Powerline Utility that shipped with the products, indicate that one or more of the adaptors has lost it's connection to one or more of the other adaptors. To resolve this issue using the Powerline Utility it was necessary to physically connect to each adaptor and to set a new network group name. A simple power off/on of each adaptor does not clear the problem, hence I suspect the root cause is some form of memory corruption (buffer/counter overrun?).