SwOS-1.10, SFP autonegotiation and 100Mbit link

Good time of the day!
I Have RB-260GS
In 1.10 changelog was announces a possibility to disable auto-negotiation on SFP port.
I tried to experiment with it, and had the semi-success. What did I do: Connected SFP port with 100-mbit mediaconverter. Of course, SFP module was previously plugged into the port. I have link detected on SFP and mediaconverter side, and SFP tab says “Loss Of Signal no”. If I connect 100mbit cable to ethernet port on converter, no data exchange between switch and other link side. If same cable unplug from converter and plug to any copper port - all works fine.

It is possible to connect SFP port with 100-mbit converter with disabled auto-negotiation on SFP? Or maybe here is limitations on SFP modules? And here any hope to implement 100-mbit connection on SFP port?

Thanks for attention.