Not sure if it has been reported. I am a Magranon Priest, and I can't dig. I do however have a dig hotkey that I use for other characters. I was set to unfaithful with a Pickaxe activated, and every time I hit the dig keybind I was losing 0.1 faith for each hit of the key. No action was started or finished because I didn't even have a shovel to use in my inventory. All I did was hit the hotkey button.
Below is a screenshot of me hitting the hotkey. The first six losses are how many actions I was able to queue. The last faith decrease was me realizing what the issue was.