When voiding a shipment, the reserved qty gets wrong on Product Info.
How to reproduce on demo.idempiere.com:
Create a new product, set price on standard price list
Create and complete a standard sales order and shipment with that product and let inventory get negative
At this point, inventory in Product Info is correct.
Try to void de order and the shipment. At this point, reserved qty in Product Info is wrong.
Tested on demo server, with reserve locator set in warehouse settings.