Created attachment 188786 [details] A spectacle screen recording of the rename process. SUMMARY When bulk renaming files (>1 file) some renamed files lose their file extension. I'm guessing this is a bug because the extensions may be unknown to Dolphin so it discards it during the rename process. This also happened in Kubuntu 24.04 LTS. Currently running Kubuntu 25.10 and this issue remains. STEPS TO REPRODUCE 1. Select > 1 file. In this case include both an "html" and a "nessus" file. 2. Rename them but do not use a "#" in them. I just want the name changed not the extension. 3. See the loss of the file extension. OBSERVED RESULT Some files lose their file extension. EXPECTED RESULT The file extension should always be retained when renaming files. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Kubuntu 25.10 KDE Plasma Version: 6.4.5 KDE Frameworks Version: 6.17.0 Qt Version: 6.9.2 ADDITIONAL INFORMATION Attaching a desktop recording so hopefully that helps.