Well I just thought about gathering this under-loved Musket wielding jobs together and put all of their existing issues into one basket for future reference. Hope it helps for when the bugs get fixed :)
1. Still not sure if this is bug or not but Panzer's range is much shorter than Sniper.
2. No Musket skill icons, the closest thing to an icon is a flower picture used for Panzer's Iron Night. This includes all Musket Passives.
3. Musket Training > No damage increase. This hurts Panzer's damage output by a lot.
1. Musket Range > Or Pistol Range doesn't actually increase attack range.
2. Musket Training > Like Panzer, Sniper's Musket Training does not increase attack damage, though Sniper doesn't suffer as much as Panzer does because of higher critical rate.
3. No Musket Skill icons: Same with Panzer none of Sniper's Musket skills have proper icons.
4. Telescopic Musket Scope > Range increasing buff, but once again it does not affect Sniper's attack range.
5. Fast Reload > While it was provided to help with Sniper's casting speed it can only be cast when the Sniper is holding a bow instead of Musket.
If there are other bugs my apologies for not including them. My Guides on Sniper and Panzer include the actual icons, I wonder if that helps?