@Matt96 Make sure that you have updated the RE firmware to the latest release - TL-WA850RE(EU)_V7_1.0.13 Build 231115 - here. Then test again.

@Stef77 It seems that the voltage dropout over the cable length is the culprit. There's nothing you can do fix this except trying another ethernet cable of a good quality (CAT 5E will fit the AP as...

@Subhajit7 According to its tech specs C50 supports both Beamforming and 2x2 MU-MIMO - details. The latest FW updates can be downloaded from the C50 support page - here. Here's how to update the...

@Stuart_123 Here you can read in more details about the TWT feature.

@Karjack Use this guide to achieve that.

@PunchStar Having three REs in a sequential connection is not a good idea - refer REs FAQ - Part 3 - Q3.6.