How were they? I can't remember, are you priming them before canning to scrub o2?
I carbonate in a keg first then fill. I was using a beer gun to fill but I have recently moved on and got a Tapcooler with the can adapter. This is a counter pressure filler and I find it much better to control the foam and purge the cans. I just opened a Pilsner that I had canned Feb 26, 2019. It was a bit darker and cloudy. The cloudiness could be from me disturbing the yeast at the bottom. It had signs of oxidation and a bit of a off flavor. I think the new filler will improve these issues. Plus, I tend to drink them in a month or so.