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Act 4 exploration

Seems to be some sort of problem with the quest where one part of the lane is basically glitched and halfway done . As a result the quest ends being completed at around 97 or 98 percent. This has wasted so much of my energy and time.
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After you had initially done SOME (but not all) of Act-4, they revamped it.
Changed paths, etc, means some paths may just have certain segments left that are still undone.
To get full explore, you need to do any path that has even one dashed segment still not completed yet.
(As for wasted energy, there are significantly less overall paths that before. From what you might have still left undone before, to right now with what is still showing undone, probably is less energy to finish now that it would have been before. (In addition to energy costs being lowered in Act-4 over the years too.)