Page 1 of Panasonic DMR E55EB jam

Advice please. While playing a DVD recorded on above equipt the picture stopped as if in pause mode. Timer also stopped. I tried various buttons to get it to start again but to no avail. Then it started to play again but the timer was not functioning. Plus no other keys on the remote or the machine would work .. even open/close, power off, skip, fast play etc. Eventually I tried pressing stop (filled in square) and CHup together (solver for cannot eject disc in the manual) and disc ejected. Unit then switched off OK. On switching back on it seems OK again and is recording Ok.

What hapened? Was it a disc fault (Tesco DVD-R)?

All help appreciated
Cheers, Phil