Меня это тоже раздражало. Я запилил себе патчик (это же Open Source):

diff -Naur libreoffice-5.4.5.1.orig/sc/source/ui/view/cellsh4.cxx libreoffice-5.4.5.1/sc/source/ui/view/cellsh4.cxx
--- libreoffice-5.4.5.1.orig/sc/source/ui/view/cellsh4.cxx      2018-01-30 20:22:07.000000000 +0300
+++ libreoffice-5.4.5.1/sc/source/ui/view/cellsh4.cxx   2018-03-17 20:21:21.039869454 +0300
@@ -128,9 +128,9 @@
     // If ScrollLock key is active, cell cursor stays on the current cell while
     // scrolling the grid.
     bool bScrollLock = false;
-    KeyIndicatorState eState = GetFrameWin()->GetIndicatorState();
-    if (eState & KeyIndicatorState::SCROLLLOCK)
-        bScrollLock = true;
+//    KeyIndicatorState eState = GetFrameWin()->GetIndicatorState();
+//    if (eState & KeyIndicatorState::SCROLLLOCK)
+//        bScrollLock = true;

     //OS: once for all should do, however!
     pTabViewShell->ExecuteInputDirect();