Sending 50k from Breez Mobile to SDK failed with `no_route`

[ok300]

I tried to send 50k sats from Breez Mobile to the Pulse node. It failed several times with no_route.

Other tests I did for the same sender / receiver:

• sent 5k successfully
• sent 40k successfully
• (50k still failed)

Other tests I did for the same sender, different GL recipient:

• sent 50k successfully
• received 50k successfully (GL -> Breez Mobile)

Other tests I did for the same recipient (Pulse node) :

• received 50k successfully from Phoenix (same 50k invoice that failed above)

On the sender side (Breez Mobile), I also tried resetmc, Update Graph, and restarting the app, with the 50k invoice still failing to pay.

So in summary

• it's not an issue with the invoice (as it could be paid from Phoenix, and it had the correct hint)
• it's not an issue with the Breez Mobile sender (as it could pay 50k invoices to another GL node)
• it's not an issue with the receiver (as it could receive 50k from another sender)

One "special" thing about the receiver Pulse node is that it has a huge history (~18k payments), but that was completely synchronized when payments were attempted.