To be honest, Watchmaker has few to no actual issues. At least, none that can't be mitigated, worked around or fixed! However, when it comes to integrating Tasker, you may hit one or two rare issues I've seen happen to others!
Many users have found that if they install Tasker after Watchmaker has been used for some time, the Tasker integration may not work as expected!
This last action is almost always the fix. It appears because Watchmaker doesn't register with Tasker for Events/State contexts, Taske doesn't acknowledge it until the app is installed again.