Like the title says, when using any RTX resource pack, the designs on custom banners no longer appear, and it just appears as the base color of the banner (White banners appear white, even when there's a red stripe on it, for example).
Also, please actually do something about this bug instead of leaving it unfixed for three years.
Linked issues
Comments 4
Duplicate of MCPE-130350. Please do not create duplicate reports for issues when you already know the original posting for this issue.
Thank you for your report!
We're tracking this issue in MCPE-130350, 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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Also, another earlier bug report for this issue, MCPE-130350
was left unsolved with no fix.