Sorry, another knotter issue....

Starting to have an issue with (I believe), one side of my knotter on a NH 565. Started to be perhaps a bale every other wagon. Today it was a lot more frequent. 20 good ones then a bad, 5 good and a bad, till I got to 4 bad in a row then a few good.
At at that point I went to rounds!
Twine is breaking just in front or behind the knot. The knot itself looks fine. When it gets out of the kicker I end up with a rainbow of hay, as one side is still tied.
I replaced the knives a few years back.
Thanks in advance for any advice.
Michael,

Sorry, another knotter issue....