In addtion to other posts like
[0.18.41] Can't drag-place blueprint
[0.18.41] Blueprint placement from map needs to be very exact
[0.18.41] Rail Placement on Map Mode doesn't act as expected
[0.18.42] ghost placement from map issue
there is a workaround:
"Settings -> Control -> Advanced Interaction -> Drag Map " chaning keybind to avoid moving the map with mouse...
Now I can place rails and everything else,
BUT
everytime I place a Powerpole in Map-mode Electric Network Info appears, Drag and Move Powerpoles is not possible.
[0.18.42] Drag placing power poles is not possible in map mode
Re: [0.18.42] Drag placing power poles is not possible in map mode
Hmm, the dragging when building is fixed now in 0.18.43, and if you set drag map back to left click, you won't have this problem anymore, so I am moving this to minor issues.