Caught it finally. It is reproduceable.
Save file: https://drive.google.com/file/d/1Cwld4VAmKNHa8wXTURXtdx3kMTvdsXs4/view?usp=sharing
Picture 1, available armor:
Picture 2, going to ALL tab:
Picture 3, equipped soldier with grenade launcher (magazine is not full) and Synedrion pistol:
Note that now storage should be 164/200 but is 161/200
Picture 4, going on ARMOR tab and two pieces are missing:
For bug to reproduce grenade launcher (magazine is not full) and Synedrion pistol have to be added consecutively without changing tabs.
Bug will not reproduce:
- If after equipping grenade launcher (magazine is not full) you change tab to ARMOR again
- If grenade launcher magazine is full (more than 8 ammo in store)