WinSetTitle is unreliable?

[VAN0]

It seems sometimes during heavy system load WinSetTitle() might not set the title of a window. It acts like it was successful and WinGetTitle() returns correct title, but visible the title remains unchanged.

Is there something can be done about this without putting WinSetTitle in a loop with a delay?

P.S.

I'm unable reproduce it at will by just running the script, even with 100% cpu usage with Prime95, it happens randomly and usually only during system startup.