When trying to use /fill... replace, the command fails to run as the block state is unexpected, returning a syntax error. However, the command still fails to run without a block state and returns another syntax error.
/fill [coords] [coords] [block] [state] [mode] [block]
/fill ~~~ ~5~5~5 stone 0 replace air
Returns syntax error due to unexpected "0" (also happens with any other number)
/fill ~~~ ~5~5~5 stone replace air
Returns syntax error due to lack of block state
This makes the replace/outline/hollow etc features of the /fill command unusable, and also prevents /fill being used for anything but the default block permutations, e.g.:
/fill ~~~ ~5~5~5 planks 1
Returns syntax error due to unexpected "1"
The same issue also affects the /setblock command
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We're tracking this issue in MCPE-166828, so this ticket is being resolved and linked as a duplicate.
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