In the above versions...
Pushing a block over a beacon, which in turn pushes another block out of the way, instead of just swapping them over as you would expect, the beam flashes white during the transition.
I have noted that from 1.14.3 PR 4 a peculiar side effect occurs 65 blocks above the beacon, the white flash stops happening on the beam, this 65 is not world height related but beam length as a higher placed beacon still shows the beam flash:
A beacon placed at height 11, has the beam stop flashing white from height 76, whilst a beam from a beacon at height 14 will still flash white until height 79.
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migrated
Uriel Salischiker
While the piston is pushing a block, it changes the position of that block to a minecraft:moving_piston which is transparent, meaning the beam would briefly switch to its original color
pokechu22
This probably started appearing in 14a because MC-127238 was fixed.
migrated
This has been a thing for some time... I know at the very least I experienced it in 1.12.2 (pre MC-127238).
migrated
Prior to the 1.14 Snapshots this was a random occurrence and hard to pinpoint, since the 1.14 snapshots and the other beam fix it happens on every single beacon beam block swap.
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BeaconFlashBug.gif added
The blocks on the right are solid blocks - coloured concrete, the left are transparent - stained glass.
Both let the (usually white) beacon beam flash through them.
migrated
Affects 20w51a
Brain81505
This appears to be a dupe of MC-123217
[Mod] Jingy
Thank you for your report!
We're tracking this issue in MC-123217, so this ticket is being resolved and linked as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
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