The bottom texture of the lightning rod is incorrect and not in parity with Java. The Java texture was updated in the latest snapshot to fix MC-203605, but it isn't the same as Bedrock.
MCPE-123568
Bottom texture of the lightning rod is different from Java
Open
0
(Unassigned)
502194
Confirmed
Multiple
vanilla-parity
1.17.30.23 Beta, 1.17.30.20 Beta, 1.17.11 Hotfix, 1.17.10, 1.17.10.21 Beta, , 1.18.30.30 Beta, 1.18.30.31 Preview, 1.18.12 Hotfix, 1.21.0, 1.21.44 Hotfix
Retrieved
affects 1.17.30.20