I tried doing a search but haven't seen this mentioned before.

If I put the line '/view custom' in a script then it does not change to the custom view. However, the same command does work from within a textbox in the game.

Tested using U35 in both the MRT and XFG.

A few years later ...

Already I had to report this bug, but I found your post. I see that you're much faster.
// Really I do not know why I kidding, I should cry.

Looks like view command is not interpreted or is overwritten by settings of LFS (default driver view).

That's because all the scripts are done actually before you leave pits, so the view gets overridden immediately after you set it in your script. You can test it by typing e. g. /say Test and you'll see the text before the "xxx left the pits (yyy)".

I also find it wrong in some cases, for example once I wanted to turn off the lights automatically on start by typing /press 3 and it didn't work either.