6.43.8 changelog:

MAJOR CHANGES IN v6.43.8:
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!) telnet - do not allow to set "tracefile" parameter;
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Changes in this release:

*) bridge - fixed IPv6 link-local address generation when auto-mac=yes;
*) capsman - fixed "group-key-update" parameter not using correct units;
*) crs3xx - improved data transmission between 10G and 1G ports;
*) console - properly remove system note after configuration reset;
*) dhcpv4-server - fixed dynamic lease reuse after expiration;
*) dhcpv6-server - properly handle DHCP requests that include prefix hint;
*) ethernet - fixed VLAN1 forwarding on RB1100AHx4 and RB4011 devices;
*) gps - added "coordinate-format" parameter;
*) led - fixed default LED configuration for RBMetalG-52SHPacn;
*) led - fixed PWR-LINE AP ethernet led polarity ("/system routerboard upgrade" required);
*) lte - disallow setting LTE interface as passthrough target;
*) lte - fixed DHCP IP acquire (introduced in v6.43.7);
*) lte - fixed passthrough functionality when interface is removed;
*) lte - increased reported "rsrq" precision;
*) lte - reset USB when non-default slot is used;
*) package - use bundled package by default if standalone packages are installed as well;
*) resource - fixed "total-memory" reporting on ARM devices;
*) snmp - added "tx-ccq" ("mtxrWlStatTxCCQ") and "rx-ccq" ("mtxrWlStatRxCCQ") values;
*) switch - fixed MAC learning when disabling interfaces on devices with Atheros8327 and QCA8337 switch chips;
*) system - fixed situation when all configuration was not properly loaded on bootup;
*) timezone - fixed "Europe/Dublin" time zone;
*) upgrade - automatically uninstall standalone package if already installed in bundle;
*) webfig - do not show bogus VHT field in wireless interface advanced mode;
*) winbox - added "allow-roaming" parameter in "Interface/LTE" menu;
*) winbox - allow to change VHT rates when 5ghz-n/ac band is used;
*) winbox - renamed "Radius" to "RADIUS";
*) winbox - show "Switch" menu on RB4011iGS+5HacQ2HnD and RB4011iGS+;
*) wireless - added new "installation" parameter to specify router's location;
*) wireless - improved stability for 802.11ac;
*) wireless - improvements in wireless frequency selection;

Download the new 'RouterOS 6.43.8' version here: https://mikrotik.com/download