For people asking about the power armor reset bug, ThePersyn provides a nice explanation when (s)he says:

"The reset bug only effects power armor and containers within the normal settlement boundaries. When certain changes are made to a settlement (expanded boundaries, removed meshes), the game resets those items to their default state at the start of the game. Most power armor reverts to T-45 and any upgrades are lost. Containers might be emptied and replaced with random items. Purchased power armor frames are not effected, nor are power armor frames that are stored outside the altered settlement. Likewise, containers made by the player before the cell was altered are also not effected.

It only effects items that already existed at the start of the game that are in the settlement at the time it was altered by a mod. Sometimes it's triggered by a specific mod while other times it's a conflict between two or more mods changing the same settlement."

Kudos for the explanation, by the way, as I have never encountered that bug, so I don't really know anything about it.