the usage of l'indicatif after "que" for "comment ça se fait que"

Question

Bonjour,Recently, I saw a video by a French prof saying that we use l'indicatif after the pronom relatif "que" in "comment ça se fait que" for an informal conversation.Is it correct?Thank you very much for your response!!!

Accepted Answer

Hi Umi,
In my opinion you would use:
- the indicative after ‘Comment ça se fait que ...’ 
which is a lower register to the more elegant
‘ Comment se fait-il que ...‘ which will be followed by the subjunctive.

Answer

Hi Umi,
Yes, you have to use ‘que’ after ‘comment ça se fait’ or ‘comment se fait-il’ -
Comment ça se fait que vous arrivez en retard ?= How come (that) you are arriving late?
In English it has disappeared but very much essential in French...

Answer

Bonjour Cécile,Thank you very much for your response.Sorry!! I think I didn't explain well for the question I had.My question was le subjonctif vs l'indicatif after the pronom relatif "que" for "Comment ça se fait que..."It seems that we must use le subjonctif, however, I saw a video by a French professeur saying that l'indicatif is used in an informal conversation.For example, "Comment ça se fait que t'es encore en retard ?"Instead of, "Comment ça se fait que tu sois encore en retard ?"Thanks very much!!!umi