Hi @maresj
It is possible you have hit the php variable limits.
Try adding this settings to your php config files.
max_execution_time = 90 ; Maximum execution
max_input_time = 60 ; Maximum amount of time
memory_limit = 512M ; Maximum amount of memory
max_input_vars = 2000
suhosin.post.max_vars = 5000
suhosin.request.max_vars = 500
