Ctrl-F for Navigation instead of FIND? FIND with "ALT-F" - the shortcut used to open one of the main menus - FORMAT!? This MAY be a translation (l10n/i18n) problem, but there should be a general guideline NOT to use any shortcut combinations using the ALT or WIN (Super in Linux) and a single key.
Can you please share your full version info from Help > About LibreOffice? Not reproduced with: Version: 24.2.0.3 (X86_64) / LibreOffice Community Build ID: da48488a73ddd66ea24cf16bbc4f7b9c08e9bea1 CPU threads: 8; OS: Linux 6.5; UI render: default; VCL: gtk3 Locale: en-AU (en_AU.UTF-8); UI: en-US Calc: threaded
*** This bug has been marked as a duplicate of bug 159743 ***