Just noticed. Mission board used to be disabled (lately only accepting deliveries) during lockdown, now I am in a station in lockdown and the mission board is regularly open, giving out all missions for all factions, even the one in lockdown.
The 2.2 patch notes have nothing on lockdowns. I remember a discussion some time ago about the lag in the galaxy map that made it impossible to know if a system was in lockdown before jumping to it. Very annoying for traders. Maybe this is a fix/workaround for the lag problem?