hello all,
i apologize ahead of time if this is in the wrong subforum. if that's the case, please let me know where i should move/repost this.

my girlfriend recently purchased a complete (stock) 2016 50cm Long Haul Trucker (26" wheels).
it's been having problems shifting up front since the moment she received it. either it won't shift into the big ring, and in the rare occasions that it does, the chain often falls off to the outside. we've had a number of mechanics attempt to adjust it, and while it ends up working for a mile or so after adjustments, these problems quickly return.

the last time we brought back the bike to the shop she bought it from, they discovered that the stock 2016 LHT's are built with a 10-speed cassette out back w/ an XT 10-speed RD, but the front is an Andel triple crankset (48-36-26) paired with a Sora 9-speed triple FD. the bar end shifters are also a 3x10 set by microshift. here's a link to the parts list.

anyhow, the bike shop found the choice of FD odd (as do I) and think that this is potentially the root of the problem. with that in mind they have offered to replace the FD with a more compatible one for free.

my question for y'all is, which currently available FD would you choose as a replacement for that Sora 9-speed triple FD? my instinct is a Shimano triple 10-speed mountain FD since some of them are actually designed for 48-36-26t cranksets and those Microshift bar ends are described as being "Shimano 10 Speed MTB Shifters Compatible", but I am open to suggestions.