In 2077 the compiler will use the double speed UART flag if it is available. It will try to calculate the best possible baud and so tries with double rate flag set too. The old compiler did not do this.
Just make sure your code uses config com so the uart is properly setup.
As an alternative, you could renamed the u2x constant from the dat file. then the compiler will create uart init code without using double baud flag.
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