In contrast to MCPE-161436, which was labeled as "working as intended," there's a need for Java to change, which seems unusual. Either Java should undergo modification, or MCPE-161436 ought to be reopened. Based on MCPE-161436, the empty sections of the boss bars are consistently gray on Bedrock since version 1.18.0.20, making it a valid parity issue.
Thank you for your report!
We're resolving and linking this ticket forward as a duplicate of MC-274132, as that ticket contains more detailed information and/or has already been triaged by Mojang.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
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