map is not accessible

I met the same bug twice, with same steps:
1. I saw the deadly map boss "mansion in the mists" node on atlas map,
2. I finish some node between "mansion in the mists" node,
3. I step to the blue light spot node to unlock the boss node,
4. After finish blue light spot node, a nearby node become blue light spot node, some are finished node and it can open again with none tag,
5. Finally, the road to "derelict mansion" unlock, which is connected with finished node in step 2, and it cannot open again
6. when activate "derelict mansion" node, it said "Activation failed, map is not accessible"

This bug is really disappointed, please fix it as soon as possible.