I think this problem results from selection/copy/paste of parts of names in math regions generally not being supported.
I propose to send the content of the clipboard to the currently insert position even inside names if it is an atom (containing only valid characters for names and no operators)
sternchen.sm (38 KiB) downloaded 45 time(s).
Martin Kraska
Pre-configured portable distribution of SMath Studio: https://en.smath.info/wiki/SMath%20with%20Plugins.ashx