Yeah, that might be what's happening. In Mutiny, if you select the pending transaction, it'll show you a pop-up with all the transaction's information. Click on the link at the bottom next to "TXID", ...
I have the similar issue and cant Transfer my on-chain funds. After closing the channel I see in the pop-up the following text "Channel closed because of an exception: closing_signef negotiation failed to finish within two timer ticks". I can only see the channel ID, so how can I get more information about the transaction?
1
