Magma Blocks are not absorbing light and keeping the brightness, noticed when my "furnace" wasn't glowing.
[media]Linked issues
is duplicated by 10
MC-138446
Magma blocks stop emitting light if chunk is unloaded
Resolved
MC-145609
Previously transparent blocks don't let light through
Resolved
MC-147024
Magma blocks don't provide light
Resolved
MC-149516
Magma Block don't save the lightlevel
Resolved
MC-150150
Magma blocks don´t saving the light from other light sources.
Resolved
5 more links
That was a bug that got fixed. See MC-102162.