Just got to the point in campaign, where I returned to the Divine Era (for the first time). Got to “Heoborea”, and first thing I did was go around the village instead of going to one of the 2 waypoints. I entered “The Solemn Path” instead and I got notified that I completed “The Temple of Heorot”. Went back, and now “The Lance of Heorot” was completed too. “Wrath of the Wengari” was completed too - I guess that’s part of “The Temple of Heorot”
Happened in Offline mode. Screenshot showing I have no waypoint except for Heoborea unlocked, and got the quests completed. https://imgur.com/a/SszgxeZ
Edit: Just to share the ending - I didn’t continue straight toward the blessing quest, and instead went towards the places I was supposed to go to do the completed quests - stuff like the horn, and the G-guy were still where they were supposed to be, and I was able to interact with them, as if doing the associated quests.