It doesn’t seem to be the issue described in MC-262268 but closely related, as the arrow keys exhibit a similar ui function usually. I wouldn’t delete this report as a duplicate but definitely link them as they are probably related
Thank you for confirmation,I did search using the internal search engine and did not find anything, hence I made my report. Funnily enough my report is now ranked above the original report on google search, where I could find it. I will add my information to the old report, thank you
After 2 hours of investigation and loading 21 Different Versions of the Game I found that this bug first occurred in 20w17a, a 1.16 Snapshot, as seen in the attached Screenshots. This confirms, that this is indeed a bug as this is nowhere mentioned in the changelog.
Now that that is off the table, I would be happy if it could be recognized as what it is, thank you.
(Both worlds were freshly created, creative, cheats enabled, no experimental features)
I reported this as MC-265612, now listed as duplicate.
I tested this bug in 1.7.10, 1.8, 1.9, 1.10, 1.11, 1.12, 1.13, 1.14, 1.15, 1.15.2, 20w06a, 20w13b, 20w14a, 20w15a and 20w16a with negative results,
furthermore I tested 20w17a, 20w19a, 20w22a, 1.16pre 1, 1.16, 1.20.1 and 1.20.2 which all lead to positive results.
I conclude that this bug is due to changes made from 20w16a to 20w17a, as this is the earliest this bug occurs.
Changes to writable_books in 22w42a (1.20) did neither affect nor solve this issue as it persists in the current version.
Parity changes made to writing in books, editing item names in anvils, and recently changing signs, namely copying, pasting and moving the cursor haven't been added to book titles, which is probably why the bug ( a <= changed to <, as mentioned above ) was overlooked.
I suggest that if fixed the limit should be raised to the same limit of item names (50), because there is no reason as to why a book title should be shorter than if you just renamed the item in an anvil