Can't access directory from netns

I created a simple test netns :

sudo ip netns add test

Then I brought up the lo interface.

I'm currently in the home directory of user1, and by executing

sudo ip netns exec test ls -la

I see all the files and directories, however, I can't access a certain directory with

sudo ip netns exec test cd MyDir

It just says: " exec of "cd" failed: No such file or directory "

Here are the access rights the directory I cant access:

drwxr-xr-x 7 user1 user1 4096 Jan 18 20:08 MyDir

Now it goes without saying that I can access MyDir without any issue from ANYWHERE else NO problem ! It also happens with other directories owned and created by user1.

So why is that, what am I doing wrong? I know anything executed with ip netns exec will be executed as root, but is that the issue?