Did you adjust your temperature much during processing?
Adjusting too quickly is one of the biggest causes of siphoning.

Deanna

As long as the food was processed at the current recommended time and temperature and the jars are well-sealed, the food is safe even if there has been siphoning.

But, if you're experiencing siphoning with a wide range of canned goods, the real issue is why it is occurring and how to prevent it.

Carol

Agree the food is safe. It may discolor but you can pitch that. But siphoning isn't normal and needs to be eliminated. That are many discussions here about it and how to eliminate it.

Dave

The problem is probably because I did not read that you left them in the pressure canner the additional 10 min. once the pressure is down to zero. You do not open the lid, just remove the weight or counterweight. Then, set the timer for another 10 min. That will help with the siphoning issue.