Possible to hide unset fields in RTIR

Good morning!
Latest versions of RT have a very nice feature to hide the unset fields that is set in the user preferences. Basically it helps us to pay attention to the important things and focus at filled fields only.

However, I have found that this option doesn’t work for RTIR tickets. Even if you set it properly, it doesn’t have any affection: unset custom fields are still shown inside the tickets.

Can somebody point me on how to fix it ? Are there any bugs/tickets for it?

Thank you.

Is there any feedback on this please?

Thank you.

I was able to achieve that by using the following custom CSS:

/* Do not display unset fields in RTIR */
.unset-field {

in which file you specifically placed that code.