story
We spoke about it internally many times in the past but couldn't get the solution implemented because there was always something in the way. After reading your comments and I talked to the team and we just merged a change that should appear in the nightly build and make the handling of the multi-line fields better. Having a single core in 1Password 8 makes things so much easier when it comes to implementing changes across all platforms.
Also, there is a new SSH Key item type that might help in this particular case.
-- Roustem 1Password Founder