[Water Buckets] Filling sometimes causes icon to disappear in inventory

[InsatiableDev]

Not really sure how to reproduce this or how it happened, but I filled up 10 or more water buckets and the filled water bucket icon disappeared in the inventory panel.

To resolve this, I hovered over the empty inventory squares until the Filled Water Bucket tool tip popped up. I clicked to pickup the Filled Water Bucket and moved it and the icon was then visible.