It shouldn’t happen frequently, but Internet routing is a collaboration between multiple companies/entities, and the result of all those decisions combined can be nonintuitive and even a little unsatisfactory sometimes…
Phillipines → Paris is a bit much, though. If you can post a traceroute (mtr) then Fly.io infrastructure staff can often tweak† things at their end to encourage the other participants to select a better overall path.
†I think they sometimes just call the other companies’ network engineers, too, 
.