v121 Re-adding "MagTag" component doesn't work, shows blank screen. IO page gets displayAdded acknowledge.

While guide writing I readded the screen. Thought I'd done it a few times before, but maybe it'd rebooted between those attempts, or maybe somethings changed / a bug.

1. Add "MagTag" component via new component picker, change nothing.
2. remove after boot animation and status bar finish
3. Add again a few seconds later
4. Display didn't update.
5. Repeat 2-4 indefinitely.

Reproduce the issue using the component picker: add MagTag, remove it after the boot animation and status bar finish, then add it again a few seconds later. Check the IO page behavior and its displayAdded acknowledgment; done means the display updates correctly when MagTag is re-added.

Written by the indexing model from the issue text.