SwOS version 2.10 released!, but no post for MikroTik about it.
Click on 2.9 Changelog and you see this:
What's new in v2.10:
*) do not ignore RSTP port state when forwarding DHCP, PPPoE or IGMP snooped packets;
*) IGMP snooping: send out IGMPv3 queries by default;
*) IGMP snooping: handle IGMPv3 leaves much better;
*) IGMP snooping: handle dropped IGMP reports much better;
*) CRS309, CRS312, CRS317, CRS326Q: fixed ACL matching by ip destination port;
*) CRS309, CRS312, CRS317, CRS326Q: fixed ICMP TTL packet switching;
*) CRS305, CSS106: make ACL work again;
*) CSS106: improve packet forwarding between different speed interfaces;
*) restart RSTP on LACP ports that got disbundled;
*) made disabling of flow-control work as expected;
*) do not account rx-overflows twice in SNMP ifInErrors;
*) CRS328-24P-4S+: make auto upgrade work;
*) CRS326Q: fixed vlan configuration on ports sfp22-sfp24 & qsfp+1.1-qsfp+2.4;
*) added support for unicode symbols in labels;
*) make DHCP & PPPoE snooping work correctly on port trunks;
*) made port lock filter out packets with unknown source addresses;
*) CRS309: make VLAN configuration work;
*) fixed problem where disabled autonegotiation on some SFP modules
became effective only after reboot;
*) CRS305, CRS326, CRS328: improved switch-chip resource allocation;
Example download
version 2.9 for new RB260GS(CSS106-5G-1S), new RB260GSP(CSS106-1G-4P-1S)
https://download.mikrotik.com/swos2/css106/swos-css106-2.10.bin
Just find your model and change to 2.10.bin in the link if you like direct download