Bug: failure after 100 top-up attempts sometimes is not shown

[C-Otto]

When using the top-up feature, the last line explaining a failure after 100 attempts sometimes is not shown.

{"timestamp":"2024-01-15T08:53:55.466063193Z","message":"#99: Sending 200,000 (68.1% = 428,742 in flight)"}
{"timestamp":"2024-01-15T08:53:56.742423233Z","message":"Sending to route #134: 100,000: [...], 73ppm, 73ppm with first hop, probability 0.9928153894112159"}
{"timestamp":"2024-01-15T08:53:56.742839991Z","message":"Sending to route #135: 100,000: [...], 167ppm, 168ppm with first hop, probability 0.9938141855063576"}
{"timestamp":"2024-01-15T08:53:56.742878376Z","message":"#100: Sending 178,742 (71.5% = 450,000 in flight)"}
{"timestamp":"2024-01-15T08:53:57.883499523Z","message":"Sending to route #136: 178,742: [...], 153ppm, 154ppm with first hop, probability 0.9889632800266046"}

No further message is shown.

[C-Otto]

Same for the "Giving up after 6 failed attempts to compute route" message.

[C-Otto]

Still doesn't work realiably.