Fast forward with TV remote

Apologies if I’m doing a dumb here - but my TV remote (using CEC) no longer fast forwards the video. This definitely used to work but now it doesn’t. Previously I could press fast forward and this would start the action and each subsequent press would increase the speed of the search, until I hit the play button.

Now no matter what I do it just moves forward 10 seconds. If I keep pressing, just more 10 second skips. No fast forward anymore. I’m sure that when this didn’t work in the past I could just pause the video and press fast forward. But that isn’t working either.

How do I get my fast forward back?

Might be my TV. The remote on my one upstairs is fast forwarding just fine…