I encounter a strange and irritating little bug with the gathering tool glyphs every day, so I thought I'd report it.
I do a pattern of gathering through my home instance and 2 guild halls (Gilded Hollow and Lost Precipice) every day. I only have 1 glyph of industry, so I follow a precise swapping pattern as I go through this routine to maximize speed and minimize swapping. I ALWAYS end with the glyph of bounty on my logging tool, so that when I enter the Grove home instance the next day it's ready to go on the trees right in front. And for some reason, the glyph is ALWAYS swapped back to my mining tool when I enter the next day. It's kinda frustrating to have to cancel the animation and swap glyphs right at the beginning, and of course just odd that it happens.
In case it's relevant, this is the pattern I follow: