A peer did a force close.

As long as your node is running, you're safe. If your peer wanted to transmit an earlier signature where they had more funds, your node would notice and issue a so called punish transaction which according to the rules of the lightning smart contract will entitle you to all the funds in the channel, regardless of the latest balance.

Thanks that's good to know. I do see that the sats did finally return to me. I just expected to see a pending transaction in my on chain wallet. 

So in 2 out of 6 swaps I've done here, one of the three has closed the channel between us. I guess there is no recourse to those nodes/users.

Unfortunately, many of us are still learning, so some nodes go offline because of technical reasons.

I wonder if it's due to the BTC price people decided to sell.