Sharepoint 365 Classic page oddity

[clareq]

This one has me stumped. We have a Sharepoint site which acts as our Intranet. The home page has a series of web parts, and I use audience targeting to determines who sees them. We have one user, who, despite being in the same group as all other staff members, cannot see the web pages targeted to staff. Membership of the same group grants them the correct access to the libraries if accessed directly. It is only the audience targeting that appears to be broken, and only for one user. I've tried adding different groups she is a member of to the audience targeting, but that doesn't work either. The only things she can see are those that have no targeting. Does anyone have any ideas?