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This, on top of a fully laden bicycle.
You're pushing the capacity of the drivetrain as it is, the 16t jump of the front chainset mean that gonna feel like it's too short, and if it's a little long, it gonna bounce a lot on the smaller sprocket.
Jtek recently released a Shiftmate 8a which allow MTB 11 speed derailleur to work with 11 speed road, it actually felt better than the standard road derailleur with a nominal cassette (says 11-32) due to the clutch mechanism, I recommend the SLX M7000 Shadow Plus as it got a capacity of 11-42 with an MTB double (Meaning it usually a 10t jump rather than the 16t jump of a road cassette), or 11-46t as a single.
currently I'm experimenting by going for a 11-50t cassette and a 40t chainring, and hopefully, see if it's possible to run a CX chainset (46/36) without overloading the drivetrain.
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edscoble
Don't use both large rings together, change onto the smaller front and adjust rear to match your cadence. Large and large is always gonna test a chain.