Although F-Secure banking protection is set to on, on one device the banking protection banner no longer comes up when I log in to an online bank. Is the solution to somehow reload the software or something else?
To complete Ukko's answer, you can check the supported browser here.
Also in case you can report your bank if it is not yet on the list, following this article.
Could it be anything to do with this?
As addition to previous words with link to topic (with known trouble-things).
But also maybe need to check some of next points (if it's not related with known things from topic):
-> That browser with up-to-date version (such as.. Banking Protection maybe supported latest three releases; Or if it's Internet Explorer - it's should be just supported version). Or re-check if it's happened with any supported web-browser.
-> Current network connection under current device... comes with HTTPS-connection and there without tricks around (such as.... something).
-> Browsing Protection settings have feature about "re-install" plugins/extensions. You can to try do it... for example. If it's not related with something else. But basically... Banking Protection should be not really related with extension/addons.
Re-install all software can be helpful, but it's... just re-installation. And if it's not a trouble. Maybe need to check . Also there can be feature about uninstalling just "Browsing Protection" (by Control panel Windows) and than from F-Secure UI (part about installation/updates information) re-install current module again.