I have been having the issue that any time I try to press multiple strings with one finger, as in an F or B-flat chord, I am unintentionally bending the strings just enough that it's out of tune. It's most pronounced on F triad, first inversion played on strings 1-3.
Is this something that will sort itself out as my hands get stronger?
My background: I am a trained brass musician, fairly new to guitar.
Thank you for sharing.
That's so natural because you press strings and add pressure.
Best thing to do is to practice Chromatic scale to train your fingers.
https://tomovhxtv.vhx.tv/videos/tf-lesson-012-2-fingering-exercises
Do this everyday! No need to do for a long time.
5 minutes to 15 minutes all together.
Check your guitar intonation too.
Set up slightly higher string height.
This will help your playing.
Good job!