If value after conversion is not changed then it should not be republished

[BlackZork]

Use case:

• topic A for single register R with std.bit("1")
• topic B for single register R with std.bit("2")

R = ....00

When register data is changed to .....01 both A and B are published.

Value for B did not change, so it should not be republished again.

[BlackZork]

Fixed in 89a6092