Fwiw I'm using a '8-speed' xt mech with 10 speed STIs and no issues at all. Old 8 speed mechs are cheap, you could try another one to see if yours is just faulty for some reason?
@russmeyer started
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Fwiw I'm using a '8-speed' xt mech with 10 speed STIs and no issues at all. Old 8 speed mechs are cheap, you could try another one to see if yours is just faulty for some reason?