Opening composer modal causes console error

Steps to reproduce

1. Open the app
2. Composer a message
3. Send it
4. Click Undo on the toast

Expected behavior

No error

Actual behavior

Uncaught (in promise) TypeError: el is null
    getCandidates index.esm.js:76
    tabbable index.esm.js:530
    containerGroups focus-trap.esm.js:333
    updateTabbableNodes focus-trap.esm.js:332
    activate focus-trap.esm.js:863
    useFocusTrap NcModal.mjs:530
    mounted NcModal.mjs:370
    VueJS 20
    set pinia.mjs:926
    startComposerSessionMutation actions.js:1857
    wrappedAction pinia.mjs:1399
    actionName pinia.mjs:932
    startComposerSession actions.js:495
    handleHttpAuthErrors sessionExpiryHandler.js:11
    startComposerSession actions.js:367
    wrappedAction pinia.mjs:1399
    actionName pinia.mjs:932
    sendMessageWithUndo outboxStore.js:248
    node_modules mail.js:5395
    showUndo _plugin-vue2_normalizer-CQ6iBklL.mjs:121
    sendMessageWithUndo outboxStore.js:233
    sendMessageWithUndo outboxStore.js:231
    wrappedAction pinia.mjs:1399
    actionName pinia.mjs:932
    onSend NewMessageModal.vue:333
    invokeWithErrorHandling VueJS

The rest seems to work

Mail app version

4.3

Nextcloud version

No response

Mailserver or service

No response

Operating system

No response

PHP engine version

None

Nextcloud memory caching

No response

Web server

None

Database

None

Additional info

No response

Reproduce the flow in Mail app 4.3: send a message, click Undo, and observe the focus-trap error. Start with NewMessageModal.vue around onSend, then trace sendMessageWithUndo in outboxStore.js and startComposerSession in actions.js; done means the Undo flow completes without the reported console error.