See the picture (from a factorio map with no mods other than the official space age):
- technology-tree-break.png (981.74 KiB) Viewed 226 times
Notice the shift above the blue science that has no obvious reason.
This makes the technology tree much harder to interpret, especially on smaller screens (more relevant when looking at unresearched techs / which one to do next).
I don't know if this is a general visualization issue or depends on the configurations of the technologies it happens to, since it happens only when specific technologies are selected.