I'm not having any issues myself.... not sure which thin bars you're talking about either.
Many times it'll look like you are visually looking at the star, but your actual selector is actually below or above the area you want to select. So you need to increase or decrease your elevation to match up to the area you want to select...
Not just you. Since the last update a number of people have been complaining that you can't click on bookmarked stars like you used to (unless you do it from the list on the left of the map). I'm hoping it's one of those things getting fixed in the next update.
Whilst what you're saying is correct, this is a specific issue that was introduced in a recent update and it's alredy been commented on numerous times. There are also bug reports about it. Anybody who is saying nothing has changed must only ever have selected systems from the galmap at pretty close zoom levels because if like me you used to select at a mid-zoom it is really, really obvious.
That too - you used to be able to click a bookmark from any zoom level and by 'any' I mean I could be focused on Sol and click-select my bookmark of Colonia.
Thin Bars
Commodities markets, and other like menus. Sorry. I should have been clearer.
Haven't really noticed it being worse recently, but then again I always find the stars on the map to be a a little tricky to select sometimes.