It is a simple mechanisim that can go south very quick. If it popped back in place good, but still would wonder what hung up.
Personnaly I would take it easy for a few miles and make sure it is truly right and not getting ready to take a big one.
If you have the time and patience, would condider taking it back apart and making sure that everything is right. The cuase may have been something as simple as on of the plates in the basket being jamed when it was reloaded.
Other things to consider was if the diaphrame spring was adjusted properly and put back right. Many good ideas and suggestions on here, but would start from the lever back including making sure that something did not get out of place when you reassembled.
Since you took the basket apart, check that again to make sure the plates are properly put back in order, that the diaphrame spring is right inlcuding the seat and that it is adjusted properly. I have had on more than one occasion a plate get slightly off kilter when reloaded in in the carrier which will jam one. Due to the very close tolerence of the outer teeth on the plates to the carrier, it can very easy to jam one of the lower ones and not notice it and then cause a force.
If you are not ready to take the drink of Jack as suggestion and it seems to broke loose, just be cautious for the first few miles and make sure it is right and not broke loose due to something else.
Safe riding