VIM reindent with =

[Coen De Roover <cderoove@vub.ac.be>]

Hello, 
when I try to reindent a code block in visual mode or in command mode
while standing on the line that needs to be reindented, I use the =
command. This works, but the change is only visible when I press another
(arrow) key afterwards.
Is this typical VIM behaviour or can this be changed in the preferences
?

Thanks in advance,
Coen De Roover