Just spotted this thread: There are quite a few galaxy map issues, They never gain any traction on the issue plotter though. (I'm a very active fuel rat >2300 rescues - and deal with or experience theses issues frequetly)
1) Galaxy map can freeze the game, particualry when trying to exit galaxy map.
2) Route mode and other route options might not be set whern you log into the geme, Particuarly the first login of a session. This includes Fastest/Economical route, Cargo mass when plotting, and use jetcone booost. Simply flipping between fastest and economical route (and back again) makes those settings active. Prior to doing that, the UI looks as you want it bit the game does not necessarily honour those settings.
3) "Apply filter to route" can go missing. It can unset itself when you log into game or when you even click on any of the filter types to view the settings. If you have a filter for scoopable stars set, and thought that you have "Apply filte to route" set, it might not be set any more. I've rescued many commander who are caught out by that issue, but think it;s their error.
4) if you are in a system wth a neutron star or White Dwarf, Galavy map will always assume that you have boosted from the Neutron/WD - This is Irrespective of whether you have "Use jetcone boost" set or not, or even have a fuel scoop to get the boost. You may need to target an adjacent star to jump out of tghat system and jump therre vefore continuing your route if you are bot able to (or do not wish to) use jetcone boost. The Solid/dashed lines on galmap also assue jetcone boost due to this bug, so your fuel range and reachable "Fuel star" might not be as the map shows if you do not/cannot use jetcone boost.
(edited to add bug 4)