Environment

• TeXstudio: 4.8.6 (both)
• Qt: 6.8.2 (both)
• OS: windows 10 and macos 15.3.1
• TeX distribution: miktex fo windows and mactex for mac

Expected behavior

For any option waiting for auto completion, if it seems like a=b, if I press ctrl+space to choose b, it is supposed show all posibilities of b.

Actual behavior

It shows all posibilities of a. It is confirmed on my windows and macos machine, and does not occur on txs 4.8.5 and older versions.

How to reproduce

Not the simplest example, but it is simple enough.

% !TeX TS-program = pdflatex
\documentclass[journal=<!-- ctrl+space here to show -->]{achemso}
\title{1}
\begin{document}
\end{document}