Why did the charge from lightning disappear for a second on the iPhone 12 mini?

Question

iPhone

iPhone 12 mini
Today, when connected, the plug started charging, after a second it stopped and continued to charge again. With what it can be connected? A software failure or an early stage of a loose port and in the future you will have to twirl the wire to catch the contact?)
The cable is original, the adapter too. There are no problems with the phone, it was bought recently. I didn’t sink, I didn’t knock on anything :)
There were no more such cases, it was only once, which is very strange

Answer 1

The connector is often filled with dust (especially if you carry the phone in your pocket), clean it with a toothpick. Under certain conditions, dust can accumulate even in a month - so that the connector simply does not fully enter.
It also happens that a chip fails in a non-original cable. You do not have this case, but so, for information.
ps for many years of using Apple technology, I have never seen a loose lightning connector.

Answer 2

There were also oddities with charging this phone. The very first time - a completely new phone, a new cable - I inserted the lightning, there was no reaction for a few (5-7) seconds. Now it seems to be ok.
UPD. The problem sometimes recurs. When the lightning is plugged in, charging does not go on, it helps to remove the block from the socket and insert it back. That is, how to "reboot" the lighting chip. Conclusion: in the new iPhones, Apple even managed to make charging buggy.