I have a modal that seems to stop rendering footer completely randomly.
So far what worked was clearing cache, logging out, restarting browser (brave). Anything I do with code has no effect (comment out all JS, all HTML).
Now it's down to sample syntax
<lightning-quick-action-panel header="header"> body <div slot="footer"> footer </div> </lightning-quick-action-panel>
Down to this result:
Looking via chrome dev tools I can see
slds-hide class is not removed from footer for some reason.
Edit: I also use this component wrapped in aura's
force:lightningQuickActionWithoutHeader context, where this bug appeared again. Disabled all extensions I use to no avail. Restarting Brave browser did the trick tho.