Since `6cb337d`, the grouped notification counter is always `NaN`

[cyrneko]

Site

dev.phanpy.social

Version

6cb337d

Instance

shrimp.starlightnet.work

Browser

Librewolf 138.0.4-1

Bug description

an image speaks a thousand words

To reproduce

1. open the notifications tab
2. ...that's it I guess?

Expected behavior

It should show the number of people that interacted, not NaN

Other

No response