[BUG] "while" script expression seems to be wrong (condition must be negated to work)

[rud01f]

Using Classic UO, Razor v1.9.77.0

I wrote a script of this matter (expected infinite loop):

while (1 == 1)
    skill 'hiding'
    wait 11000
endwhile

While I expected while loop to run indefinitely, I was surprised to see every time I ran it "script finished in 30ms".
I've negated the condition while (1 != 1) and now script runs in the loop properly.

I'm pretty sure it's a bug since the manual says "while: run loop as long as the expression remains true"