Congratulations on getting a bear! I’m assuming you were the one to hunt. That is pretty cool.
You don’t say if your meat was ground or just cut up into cubes. And you don’t mention what pressure you processed, or what your elevation is. So I’m limited in what my advice to you can be but I do see a couple problems.
Processing time for quarts ground would be 90 minutes. And that would be a hot pack with liquid. The meat should be lightly cooked. Processing time for quarts cubed would also be 90 minutes. This could be either raw or lightly cooked first.
Problem one - You have under processed the meat. You say you processed for 80 minutes that is 10 minutes short of the suggested 90 minutes.
Problem two – cooling the canner too quickly. You should allow the canner to cool and reduce pressure back to zero all by itself without hurrying it. Sometimes it takes quite a while. When you cooled it quickly what happens is the pressure reduces in the canner quicker than in the jars. So if there is pressure higher in the jars it swells and pushes out the liquids. Thus your low levels of liquids in the jars.
I hate to the bearer of bad news. IF the only issue was the loss of liquid I’d say just remember next time and carefully watch the seals on those jars and use them up first. But since you under processed I’m not sure I would trust that they are safe. It could be they are fine… however you have to make that decision. If it were me I’d not trust it.
The problem is you need that heat level to be sure you stopped botulism. And botulism can’t be smelled tasted or seen. So you don’t know it is there until you get sick.
Now the good news. If it has been less than 24 hours you can reprocess the meat. Or just choose to open the jars and freeze it. Then try again with a different batch. That is probably what I would do. The meat will be very cooked if you process it again.
I hope this helps.