Previously, Packstack edited the /etc/lvm/lvm.conf file to set specific parameters for snapshot autoextend. However, the regexp used only allowed blank spaces instead of the tabs as currently used in the file. As a result, some lines were added at the end of the file, breaking its format.
With this update, the regexp is updated in Packstack to set the parameters properly. As a result, there are no error messages when running LVM commands.