Normally, the fermentation process continues slowly in the fridge ( if I don't consume it all Immediately

I just opened a small container of this kraut plus added veggies,(I had added a lot of home grown radishes to my store bought kraut.) And had not consumed the lot.
There was a white fuzzy coating on the top. I have never seen this.
Would this be ok?
Thank you
And bubbles to you
Choufleur