Must be the water
If I use regular Finish Red ball my dishwasher will rinse three times due to the suds it creates. Instead, I was using Finish Quantum tabs which worked great. Two months ago when I needed Dw detergent I bought the new version of Finish Quantum sold in the black package. In this new version, the shape and size of the tabs are different; now they are flatter and longer. Two weeks ago, while nearing the end of the package I noticed that the DW was extending the time of the first rinse. It is usually 7 minutes long, but for every run with this Quantum, it was extending the rinse to 13 to minutes.
After running out of detergent I found an old box of Cascade powder and began using it. No more 14 minute first rinses. It is back to 7 minutes. I hope I can find a box of Finish powder because I like it a bit better than Cascade.
I can't figure this out because usually if there is excess suds in the first rinse, a second rinse will be added giving 3 rinses, but this time it is extending the rinse as if there is more dirt, instead of changing the water and rinsing 3 times.