Yes, I have tried multiple different cables with same and different original chargers. I want to make a note again if you've missed that part Jace - this same issue happend to my husband's phone galaxy note4 at the same time after both of our phones got notifications to update our systems and did it in the beginning of the week. Am I the only one that finds this super weird coincidence?
Have you tried another cable with the device?
My S7 Edge also has started to have issues with fast charging. On the lock screen, it says 'Fast Charging' but the remaining time it shows is the same as normal charging. But it seems it occasionally goes back to fast charging. This started happening about 2 months ago. Does anyone have any idea?
Do you experience these symptoms if you try charging your device in safe mode?
I tried it in safe mode and fast charging worked fine, then I siwtched back to normal mode and it worked fine again. Then I put it on charge during the night and the charge was slow again (even though it indicated it was fast charing). This seems to happen quite randomly.
If the issue doesn't occur with the device in safe mode then there is a third-party app causing this. You may have to delete your third-party apps one by one (starting with the most recent) until you find the one causing this.