Machinist possible heat bug

Gun does not generate heat while having ammo.

Time: Any
Frequency: Always
World name: Sargatanas
Character name: Aila Souls
Monster name: Any
Class/Level: Machinist
Party or solo: Any
Area and coordinates: Anywhere
Steps:
1. Reload your ammo
2. Intiate battle with enemy
3. Use Split shot combo with ammunition
4. Does not generate Heat
5. Run out of ammunition
6. Generates Heat again

Expected possibly: Gun generates heat all the time as portrayed in tool-tip.

Feel free to close this thread I cannot find how to delete it, Seems Ammo actually reduces the heat gauge on purpose sorry!