You need to order a new charge cable
I want onplus7 charging cable
Same cables and chargers available in the links above suit all 2, 3, 5, 6 series, 7 and 8 series phones. They are compatible with all their models of phone.
Aggressive twisting or bending of the cable might have caused a short circuit and burnt the cable!
Mine has the same issue, woke up this morning to a burnt cable. I contacted customer service and they just said to buy a new new one because the phone is out of warranty, well I was expecting them at least to investigate as it seems this is happening to a bunch of people but it seems they don't care about older products or customers safety. I was not asking for a replacement simply for them to investigate this issue and it seems like that won't happen. I must say I'm very dissatisfied since I recently bought another oneplus phone and this experience has made me reconsider staying with the company.
Report the issue directly to OnePlus Developers as a Bug report.
The more people report it, the better, then they will have to find out what and why it happened.
What Would you Give Up for a "Compact" Flagship?
by Red Bearded BA (Jason C.), 2020-11-25