Aluminium bifold door needs to be slammed close

[Jupiter01]

My bifold doors used to close and lock very softly but it now needs a mammoth effort to slam it close and then lock.

I assume it needs some adjustment but I’m unsure where and how. I’ve included some pictures for your reference.

Thanks in advance.

 

[Notch7]

what is requiring you to slam?

is the latch not seating in the strike plate unless you really pull hard?
is the door catching on something?

 

[Jupiter01]

I definitely have to pull really hard before the door closes and presumably the latch and strike plate line up. Unfortunately, I can’t find a way of verifying this given the thickness of the door and inability to see how these are lining up. Hope that makes sense

 

[Jupiter01]

I was wondering if anyone had any suggestions on how I may be able to resolve this please.
Thanks in advance