S-31DLC20D SFP on SPF+ port

Hi all,

I try to use S-31DLC20D on a SFP+ port:
SFP is recognized
Link is ok.
TX data go out but no RX data is coming…

Using the same module on a SFP port is working correctly

tested on CCR1036-8G-2S+EM and CCR1036-12G-4S-EM
tested on RoS 6.27, 6.28, 6.29RC24

Any idee ? or bug ?

regards

Armand