Bash is needed for login shell (so only for the ldap_login role), moved tasks accordingly.

tasks/ldap_login.yml

@@ -3,3 +3,17 @@
 - name: Assert
   assert:
     that: ansible_os_family in [ 'Debian', 'OpenBSD' ]
+
+- name: apt install
+  when: ansible_pkg_mgr == 'apt'
+  apt:
+    name: bash
+    state: present
+    update_cache: yes
+    cache_valid_time: 3600
+
+- name: pkg install
+  when: ansible_pkg_mgr == 'openbsd_pkg'
+  openbsd_pkg:
+    name: bash
+    state: present

tasks/openbsd_bootstrap.yml

@@ -23,8 +23,3 @@
     regexp: '^installpath ='
     state: present
     create: yes
-
-- name: Install Bash
-  openbsd_pkg:
-    name: bash
-    state: latest