When the old graphics card uses the new engine, the block and lighting display errors, see the picture for details.
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duplicates 1
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Thank you for your report!
We're actually already tracking this issue at MCPE-104273, so I will resolve and link this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
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As of October 2020 support for graphics cards that support only DirectX 10.1 or below has been discontinued - so such behaviour is expected.