Sounds like your printer needs servicing.
Try cleaning your printer "ticket taken" sensor with a Q-tip dipped with warm, soapy water and a can of compressed air.
Do NOT use alcohol products...it will cloud the plastic sensor lens and make it worse.
Look for the paper sensor near the back of the rollers and get the dust and grime off of it.
That "ticket taken" sensor reads the black stripes on the tickets and tells when the roller motor should stop after a ticket is printed.
Here's a link you could look at?
It shows where the ticket taken sensor is on Page. 6...>>>
https://www.manualslib.com/manual/1827308/Futurelogic-Gen2.html?page=6#manual