Copying files in multistage docker pipeline fails

I get the following error when trying to copy files from a previous build stage

#!generic

Step 7/18 : COPY --from=uikit /app/binders-ui-kit.tgz  /app

failed to copy files: failed to copy file: Container ID 166536 cannot be mapped to a host ID

The file in question and its parent directoyr are owned by a user node (id:1000) (inside the uikit container). This is also the same user of the build container by using the USER directive.