You are right, there seems to be a problem in the firmware version 2.0.2_[20160405-rel33786] at least. Just tested it with a brand-new EAP120 and its initial firmware 20160405 using tcpdump. While...

Could you adopt the EAPs in the controller before they disconnected? How did you find out that the EAPs don't obtain an IP anymore? To find out wether it is really a problem with the EAPs loosing...

If you think the devices are buggy, complain to TP-Link's support, not in the user's forum. I'm not going to waste my time trying to help you to solve a config problem.

Yes, this can be the cause for the bad latency. If there is not enough AirTime for the EAP to allocate the channel (because other devices are sending at the same time), latency usually increases...

Not sure what you mean with "instabilities". Do you mean high latencies instead? If the latter, there can be many causes, such as interferences in a dense-populated 2.4 GHz band, collisions of radio...

bubas wrote 1-Do you have any ideia of the range with this antennas ( TL-ANT2408CL) Depends also on the remote's antennas. With CPEs 200 meters should work, with TL-ANT2424B I could connect over 600...