Button on remote performing incorrect action

[Caking]

I have Sky Stream and set up a pin containing the number 3. 

We had no issues until a few weeks ago and out of nowhere the 3 button on our remote developed the ability to turn off the Puck. 

It is no longer recognising it as a number, whether we're inputting the pin or changing the channel number. Can anyone help?

[MarkGoldsmith]

Try repairing the remote

Press 7 and 9 together on your Sky remote for three seconds (This resets/clears the remote)
Press 1 and 3 together for three seconds (bluetooth mode) and follow any on-screen instructions.

The next option sounds insane but a number of users have reported it resolving the issue with their remotes. You could try holding the remote at both ends and giving it a gentle twist as though you were wringing out a towel. It

A third option is take the batteries out of the remote and leave them out for several hours put putting them back in the remote.

If none of these options work you can request a replacement remote via this link: https://www.sky.com/help/forms/streaming-tv-remote

If you have an old Sky Q remote, you can use that as an interim solution whilst you await the new remote.