Muun has the highest fee cause every lightning payment received is swapped onchain. Blue Wallet adds on an extra 0.3% fee in addition to the routing fee I think. Wallet of Satoshi has no extra fees and is the 2nd most connected node on the LN, so that's why the fees are low and often 0.

samsamskies

I have this problem sometimes too but it always does end up going through within 5 mins or so for me. 

AJ1992

When I use blue wallet for larger payment , it always has payment in transit problem.. 

kale

bitcoin

What's the maximum lightning invoice you have paid? How about fee?

I have paid up to 1.6M sats and the fee around 1000 sats. I have used Blue wallet, Muun, Wallet of Satoshi and Muun has the highest fee while WoS has the lowest fee.