When I select an option from Completion Insight Pop up, instead of completing the rest of the option, SQL Development enters the whole option.
eg, I want to select the COMMISSION_PCT column from the employees table, so I type COM to get the pop up, then I press down and enter to select COMMISSION_PCT from the top down, instead of getting COMMISSION_PCT, I get COMCOMMISSION_PCT.

I know this shouldn't be the normal behaviour because the SQL developer on my work computer is working as intended when it comes to Completion Insight.
Any help would be great.