See below for a screen shot.
Version: 2.85.963.0 64-bit (September 2020)
See how the long column name causes the column name selector extend way out into the custom column formula box. This was not the case a few builds ago (August or July?)
Still happening. Version: 2.85.985.0 64-bit (September 2020)
I could reproduce this issue and will report internally. Will update here when I get any response.
Thanks @v-yuta-msft - we have confirmed the August 2020 release did not have this bug, so it is a new introduction in the Sept build. Looking forward to the fix, hopefully in October's build.
Appears to have been fixed in the October 20 build
Yup. Confirmed @jthomson - can mark this as solved, though not sure how to do that in the Issues forum.