update on the case:
I bought mikrotik sfps S-31DLC20D no any change, still port flaping on RB5009.
I have a suspicion that devices really don´t like each other
As I tried that TPLINK media converter.
ETH1 RB5009 - media converter >>> fiber >>>> SFP1 RB962 - works no mather on sfp type in converter or RB
SFP1 on RB5009 ->> fiber >>> media converter ETH2 RB962 - works , works no matter on SFP type in converter or RB !! also with cisco SFP in RB5009
The idea of downgrade RB962 to 6.49.7 also no any change. RB5009 flapping stil.
Mikrotik guys, please help !!!