Alfred 4.0.3 on OS 10.14.6 in Word Mac 16.29.
This bug is random as far as I can tell; it may occur in other apps but I've specificially noticed it in Word, and for a while at that.
I type a snippet and there is a slight delay in expansion, a stutter, and instead of expanding the snippet to the desired text, instead the last copied and pasted text (presumably whatever was on the clipboard) is pasted.
I cannot figure out if it happens under particular circumstances; it seems intermittent. But I can usually force it to happen by clicking to another part of the