RB4011 - SFP Link Flapping once per second

Hey Guys,

i have a RB4011 with current stable firmware. My SFP is a 1 GbE SFP from FiberStore, branded as JUNIPER. It is a BiDi 1550/1310nm (yellow marked).

Per second the link flaps. Also the UI shows (Running, Standby, Running, Standby…)

https://youtu.be/-xBT-wZGTe0

The same SFP is funktional in RB3011 and RB2011, also on hAP AC and on hEX Pro and hEX.

Autonegotation disabled
Fixed 1 GBit
Full Duplex

What can i do to make the SFP running on RB4011?

EDIT: Seeing that here is the same issue-report: http://forum.mikrotik.com/t/sfp-for-rb4011/125840/1

Switch to testing channel. 6.44beta/rc handles SFP much better on RB4011.

http://forum.mikrotik.com/t/v6-44beta-testing-is-released/123205/324

What’s new in 6.44beta61 (2019-Jan-17 13:24):

Changes in this release:

*) rb4011 - improved SFP+ interface linking to 1Gbps;

There is an issue with the RB4011 and SFP modules, currently being worked out.

I will give it a try.

A user already confirms that the SFP i currently use is now supported.
http://forum.mikrotik.com/t/v6-44beta-testing-is-released/123205/324