Here is a list of what was fixed since 11.5.14:

• 2022-08-25 54ef8ceea3 [RELEASE] Release of TYPO3 11.5.15 (thanks to Oliver Hader)
• 2022-08-24 d9ae26a95d [BUGFIX] Avoid 'undefined array key "sheetTitle"' warning (thanks to Daniel Hettler)
• 2022-08-24 99294cc4cd [BUGFIX] Add resultArray reference for InlineControlContainer customControls hook (thanks to Oliver Bartsch)
• 2022-08-24 9ef617750a [BUGFIX] Fix page reloading on click on preview button (thanks to Tobias Jungmann)
• 2022-08-24 0cf8a2ce30 [BUGFIX] Avoid invalid property access when persisting extbase objects (thanks to Stefan Bürk)
• 2022-08-22 fa7bd9f980 [BUGFIX] Make sure social media images gets processed if needed (thanks to Kevin Appelt)
• 2022-08-22 b03d039e23 [BUGFIX] Avoid undefined array key XmlSitemapRenderer (thanks to Oliver Hader)
• 2022-08-21 90aab170e0 [BUGFIX] Fix typo in clipboard and SettingsController (thanks to Peter Kraume)
• 2022-08-19 19633a3aee [BUGFIX] Avoid undefined array keys error using stdWrap_bytes (thanks to Chris Müller)
• 2022-08-19 f613738164 [BUGFIX] Fix warning when FlexForm sheet has no fields (thanks to Torben Hansen)
• 2022-08-19 aeabd0f57a [TASK] Allow Element and DocumentFragment in now stricter Modal API (thanks to Andreas Fernandez)
• 2022-08-17 ecf97e126c [TASK] Clean up PHPDoc comments in ext:felogin (thanks to Torben Hansen)
• 2022-08-17 807ae96fe8 [BUGFIX] Fix warning on array key "1" (thanks to Tomasz Woldański)
• 2022-08-17 dc55dbbac0 [BUGFIX] Fix warning on array key updateReferenceIndex (thanks to Tomasz Woldański)
• 2022-08-17 d1f28d4cef [BUGFIX] Fix warning on array key "data" (thanks to Tomasz Woldański)
• 2022-08-17 65e294edf3 [BUGFIX] Prevent warning when FlexForm is empty in PHP8 (thanks to Torben Hansen)
• 2022-08-17 679b3598bc [TASK] Allow hiding "Entire workspace" drop down (thanks to Christian Kuhn)
• 2022-08-16 12d2e2217c [BUGFIX] Avoid open_basedir errors when referencing absolute URLs (thanks to Benni Mack)
• 2022-08-15 f8fa1be34e [BUGFIX] Do not hide ContentObjectRenderer on form rendering (thanks to Elias Häußler)
• 2022-08-15 3dcb0c17a0 [BUGFIX] Correct tree.pagelayout condition evaluation (thanks to Nikita Hovratov)
• 2022-08-13 3bb6e34cfb [TASK] Add exception message to log message (thanks to Georg Ringer)
• 2022-08-13 e5f4eff498 [BUGFIX] Toggle inline controls only in own scope (thanks to Nikita Hovratov)
• 2022-08-12 ed841a8c82 [BUGFIX] Add sd and hq YouTube preview image resolutions (thanks to Michael Hitzler)
• 2022-08-12 e2fa941173 [BUGFIX] Reflect size property to attribute in icon-element (thanks to Helmut Hummel)
• 2022-08-12 5b984a3483 [BUGFIX] Prevent array access warning on deleted database record (thanks to Daniel)
• 2022-08-12 e0b362f2c4 Revert "[BUGFIX] Abort commit if commit message does not fulfill all requirements" (thanks to Christian Kuhn)
• 2022-08-12 d00971f37c [BUGFIX] Disable pagetree drag and drop for touch inputs (thanks to Benjamin Kott)
• 2022-08-12 49d599974f [TASK] Remove leftover tt_content.select_key in content preview (thanks to Oliver Bartsch)
• 2022-08-12 a7efaeef33 [TASK] Extract url generation in ext:workspaces (thanks to Tomasz Woldański)
• 2022-08-11 b53fdd4294 [DOCS] Fix typo in title and filename (thanks to Česlav Przywara)
• 2022-08-11 91a7e9fb55 [BUGFIX] Re-apply stdWrap for typolink.parameter values (thanks to Benni Mack)
• 2022-08-11 129f7a67c6 [BUGFIX] Avoid workspace field query for non workspaced table (thanks to Stefan Bürk)
• 2022-08-10 56fb16033a [BUGFIX] Allow non-valid absolute paths for createVersionNumberFileName (thanks to Benni Mack)
• 2022-08-10 7c01db3954 [TASK] Enhance help text for extension:setup command (thanks to Sybille Peters)
• 2022-08-10 bc23e0c375 [BUGFIX] Handle missing BE user data in BackendUserAuthentication (thanks to Markus Klein)
• 2022-08-09 c21477b4cc [TASK] Raise "typo3/class-alias-loader" (thanks to Stefan Bürk)
• 2022-08-09 b23ae0cecc [TASK] Set TYPO3 version to 11.5.15-dev (thanks to Benni Mack)