A problem? They became lazy, especially when the weather was cold. When the Twizy is new and it is warmish then operating the door latch used to mean the doors went up on their own. Mine just got slower and slower and needed manual assistance. The dealer decided this was not right and changed them.
If you remember @ALEXAKOS was offering struts to correct the issue if you have the dreaded windows.
I recently found that leaving the doors open makes them operate better. Might experiment with this. Just that at this years MOT the doors were left open and were a lot stiffer to close. They also opened better but was that simply down to the higher temps? No sure as it has been warm before in the last 5 years.