Should I expect it to say "Registered input" like on 1.7.x rather than "Register input"?
-snip-
(Edited) I just looked now at Sparrow again and I have had some remixes since I made this post. So it seems that this is normal.
I can confirm this as I happen to have an existing postmix UTXO in TestNet and that specific UTXO displays it differently in old and new versions.
Here's some screenshots for comparison:
Old Version (output ...56d...:2)
- Close wallet, then open in version 1.8.5:
Latest Version (same output ...56d...:2)