I tried to categorise my storage today and when I placed an oak sign, it directly appeared on the ground/wall and the text editing GUI didn't pop up. This was later confirmed for all kinds of signs in another save.

Shift right click

Shift right click

nope, it doesn't work. the sign still appears as a blank one.
btw u might be getting me wrong. i'm not trying to put it on a container, this happens even when i try to put a sign on solid walls.

Shift right click on a placed sign to edit it.

Shift right click on a placed sign to edit it.

thanks it works.
still i do wonder why it is like this. is it related to some mods?

Most likely removing that mod in next update as it confuses people.

Most likely removing that mod in next update as it confuses people.

No, keeping it can likely benefit most people, but some in-game reminders would help a lot.

Most likely removing that mod in next update as it confuses people.

At least I don't need to remove the signs first to change the text XD