Attempt to move one split to new category moves all splits with same category

[jillelaine]

KMyMoney v.4.8.0
Ubuntu 16.04.6 LTS

In KMyMoney, in a transaction with multiple splits, where more than one 
split is assigned to the same category, attempts to change only one 
split to a new category changes all splits with the same category to the 
new category.

Go to 'Categories' > select original category > select transaction split 
to move to new category > right click & select > 'Move transaction 
to...' > and select desired new category from the 'Select Account' list.

Result: all splits assigned to original category within the same 
transaction are moved to new category, even though only one split is 
selected.

Issue also occurs during 'batch' 'Move transaction to...' via Categories.