[md87]

Hi, I am looking for some help with my Pentax 67.
This has happened to me 3 times in a row, in the middle of shoots which has been quite frustrating.
I load the film, start shooting; and then at about the half way point of the 120 film, the film stops advancing. I can still fire, and use the lever (the lever isn't jammed); but the frame will not move up to the next number, and I can feel that the film inside is not winding anymore.

The first time this happened, I had no idea what to do so I took out the film, wasting my shots, and replaced the batteries and put a new roll in, and it started working again.
(So I assumed it was batteries)
The next time I very confused because I had just changed the batteries. I didn't have time to play around so I changed the batteries again (and had to waste the film inside as I had to remove it), and it worked again.
Now today, it happened again. The battery check shows that the battery is not dead. The film got stuck on 5.

Does anyone know why this is happening and how to fix?
Any ideas would be appreciated, thanks!