EA6400 - Wireless Ethernet Bridge 5G crashs after few seconds on 2019.2 and 3 beta

[Patrick Delcroix]

Whenever I try to setup my EA6400 as Wireless Client or Wireless ethernet bridge, the connection is working very well for few seconds (I reached 500 Mbps on a speed test - rqte = 351 Mbts in the tomato GUI ) but after few seconds the connection rate drop to