I do see a behavior where when the dialog is first shown, if the search type is already set to ISBN, the checkbox is not disabled but still can't be checked. If I change to Text then back to ISBN, that behavior corrects itself, it appears, so that's a workaround.
Git commit 53923426413bce40c9b474dd866efe48f23d403d by Robby Stephenson. Committed on 06/02/2022 at 02:10. Pushed by rstephenson into branch '3.4'. Fix layout bug in fetch dialog A spacer widget was interfering with the layout and could prevent clicking on the Multiple ISBN checkbox at times FIXED-IN: 3.4.4 M +5 -1 ChangeLog M +1 -1 src/fetchdialog.cpp https://invent.kde.org/office/tellico/commit/53923426413bce40c9b474dd866efe48f23d403d
Git commit 360f9954a9edbb368ce5001930e87f77ff1a7551 by Robby Stephenson. Committed on 15/02/2022 at 02:18. Pushed by rstephenson into branch 'master'. Fix layout bug in fetch dialog A spacer widget was interfering with the layout and could prevent clicking on the Multiple ISBN checkbox at times FIXED-IN: 3.4.4 M +5 -1 ChangeLog M +1 -1 src/fetchdialog.cpp https://invent.kde.org/office/tellico/commit/360f9954a9edbb368ce5001930e87f77ff1a7551