Placing a sign on an already placed sign can make that sign turn into the new one (not place the block but re-place it)
Steps to Reproduce:
get signs (With +DATA if posible but normal works too)
try to spam place the signs each time adjasoned to one another
try remembering the orientation
Observed Results:
the orientation of some signs has changed to the new ones (basicaly replaving them
Expected Results:
The sighs should still be stacking next to one another and not replacing them
Related issues
Comments

Duplicate of MCPE-102371