nRAYG 60 problem ?

Yesterday I start testing nRAY 60 on my PTP link LHG60 - LHG60 1990m at the moment I remove only one side with nRAY. RSSI on lhg60 LHG60 was -58 now with nRAY RSSI -54 Rate 2,3 Gbit . Today I noticed that throughput drop to 240Mbit. Rate was stil 2,3 Gbit I start BT on this link and I measured only about 250 Mbit so I disabled and enabled wifi interface and then all ok BT speed 980Mbit. Anybody noticed any problem on nRAYG 60 ? ROS on nRAY is 6.48 beta48

picture from dude nRAY60 poor link
S46 link poor.jpg