If you grant someone user rights by clicking the "Block Bookout" right, it will not work.
If you instead grant someone user rights by clicking the "Block Operations" right, it will work.
Issue is present in 60.4.3
https://www.loom.com/share/019faa3943d041a599abc6322a04bffb?sid=dfd3055e-c45c-4b7f-a086-4bcdc7a41abf

Possibly related to Rights to Client Vitals