Summary:
When a block is moved by a piston in a dark area, the block appears brighter for a split second.
Steps to Reproduce:
Place a piston
Place a lever on the piston
Place a block in front of the piston face
Set the time to night
Activate the piston
Observed Results:
The block appears brighter for a split second.
Expected Results:
The block should not appear brighter.
Video:
[media]Linked issues
is duplicated by
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Comments

not fixed in 1.19.50.20
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This issue seems to also strangely affect dyed water in a way as seen below:
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Confirmed in 1.21.44
Prior to the fix to MCPE-66250, the light level of a moving block was copied from the light level of the coordinate of the block that it replaced. That was correct, despite the texture being wrong. Now, after the texture fix, it looks like the light level is no longer based on that coordinate, but is instead always maximum (15).