Live Weather at cruise playing up again

On a current flight from Nice to Manchester and after around FL250 the plane will randomly swing either left or right losing around 70 knots or more on the A320. Only started happening again recently.
It’s definitely the weather as it went from 7 degrees to -25 in the matter of seconds.

Any fix other than going on preset modes? Thanks

This has happened on a few flights now for the past 2 days.

Do you have any video recording?

No. But I will try upload one tomorrow.