I recently noticed that when going to a previous page in writable books, the game crashes. A "java.lang.StringIndexOutOfBoundsException" error is raised. The bug is present only in writable books, signed books seem to behave fine.
In attachments there are crash logs.
Environment
Windows 10 64-bit, Java 1.8.0
Linked issues
is duplicated by 18
MC-181817
Writable book in multiplayer crashes (20w17a)
Resolved
MC-180137
Game crashes when exiting a written book with Escape
Resolved
MC-180190
Book and quill crashing the game
Resolved
MC-180222
When pressing the back-page arrow in a book, the client crashes
Resolved
MC-180370
Book and quill crash
Resolved
13 more links
I cannot reproduce this.