Index: lams_central/web/css/bootstrap/_button-group.scss
===================================================================
diff -u -r9f4482aa1d29f454f091420cc38d3b27a3f4cc8f -rb7c92dbcfdb0469dbc0144190a201757f398e529
--- lams_central/web/css/bootstrap/_button-group.scss	(.../_button-group.scss)	(revision 9f4482aa1d29f454f091420cc38d3b27a3f4cc8f)
+++ lams_central/web/css/bootstrap/_button-group.scss	(.../_button-group.scss)	(revision b7c92dbcfdb0469dbc0144190a201757f398e529)
@@ -34,6 +34,8 @@
 }
 
 .btn-group {
+  @include border-radius($btn-border-radius);
+
   // Prevent double borders when buttons are next to each other
   > .btn:not(:first-child),
   > .btn-group:not(:first-child) {
@@ -42,6 +44,7 @@
 
   // Reset rounded corners
   > .btn:not(:last-child):not(.dropdown-toggle),
+  > .btn.dropdown-toggle-split:first-child,
   > .btn-group:not(:last-child) > .btn {
     @include border-end-radius(0);
   }