Unfortunately, I haven't been able to reproduce any issues here so far.
If you run the following command:
//noop $tip(test,The Wendigo The Wendigo! I saw it just a friend ago! Last night it lurked in Canada; Tonight on your veranada!,As you are lolling hammockwise It contemplates you stomachwise. You loll It contemplates It lollops. The rest is merely gulps and gollops,5)
Right, thanks, I was able to reproduce it by spamming it. It is indeed intermittent. This is actually a different issue to the original post. The original post issue is resolved, however the bug fix introduced a side-effect. This has been fixed for the next version. Thanks for your help everyone.