When a sign is dyed when a player is still editing it, this change is reflected on the editing screen. However, the glowing effect is not shown in this case.
MC-227965
Glowing effect on signs is not shown in the sign editing screen
Open
9
(Unassigned)
Confirmed
Platform
Low
Rendering
1.17, 1.17.1, 21w41a, 1.18.1, 22w15a, ..., 1.19.4, 23w12a, 23w18a, 1.20.1, 1.21
Retrieved
Can confirm.