OIDC extension fails when user pic names are too long

We are using XWiki v13.10.9 with PostgreSQL and the OpenID extension, v1.34.2. We use it to enable Google SSO.

For one user (so far only) Google provides a user picture filename which is 967 characters long, which exceeds the max length for xwa_filename (768) in table xwikiattachment, and also a column size in the xwikistrings table.

Re-uploading the userpic did not change the situation: The filename is different but also 967 characters long. We could not find information what influences this behaviour by Google nor how to affect it.

Increasing the database column lengths seems not to be an appropriate reaction.