I discovered and solved the problem but I could not uncover the reason.
Answer: Create a new boolean and use it to replace the “Jump Button Down” boolean within the script that Adds Force to character movement (picture 2)
Reason: The boolean “Jump Button Down” is the problem. Somewhere in the code the “Jump Button Down” is switched to False even though the keybind is never released. I think it’s due to the functions located in picture 1 named Jump and Stop Jumping. If these functions are removed the character does not jump hence they should remain. By creating a new boolean to dictate if the jetpack is available (true) or not available (false) solved my issue with Jump Button Down. Simply within picture 2 replace the Jump Button Down booleans with the new boolean.