Deleting a row does not delete Meta for that row

I'm seeing behaviour where deleting rows does not delete the Meta information associated with the deleted row, but rather leaves the Meta data behind for the row that shifts up to take it's place. It happens with both Firefox and Chrome w/ JExcel 4.3.0.

To reproduce:

1. https://bossanova.uk/jexcel/v4/examples/meta-information or https://jexcel.net/v7/examples/meta-information
2. Get all meta information = {"A1":{"myMeta":"this is just a test","otherMetaInformation":"other test"},"A2":{"info":"test"}}
3. Delete Row 1 & Get all meta information = {"A1":{"info":"test"}} (Good: Row 2 became Row 1)
4. Delete Row 1 Again & Get the meta information for A1 = {"info":"test"} (Bad: Row 1 was just deleted)

Reproduce the issue in the linked meta-information example using the four steps in the report. Start by tracing row deletion and the metadata returned for A1 after the second deletion. Done means deleting a row also removes its metadata, so querying A1 no longer returns the deleted row's information.