If you place a block above a flammable mob during the day then place a cobweb covering the mob then break the block placed earlier then the mob won’t burn until you break the cobweb.
Linked issues
Attachments
Comments 3
WAI, duplicate of MCPE-51468
MCPE-101345
Mobs don’t burn under cobwebs
Resolved
Duplicate
1
This isn't just a IOS bug, it will happen on other devices too.