Hey All,
This is really strange!!!
I haven't had this problem in years and I have been updating my Ubuntu every 6 months.
I'm now on 20.10 and waiting for the release of 21.04.
But I did completely forget how I solved this issue when I had it
But if had such a problem, now, the new arrangement of the Settings no longer has "System Settings->Preferences->Input Method"
I've had a good search and I can't find "Input Method" anywhere else
Let's hope that methods 3, 4 or 5 on the Wiki page can solve this problem.
Cheers,
Gus