Description:
After evaluating the fix in Radiant 2022.1 for DNG-15807, the create_clock constraint in *.fdc still persists, and upon checking, the design has an unmatched constrained object in *.ldc and *.vm in which the mismatch happens before post-synthesis in Synplify Pro.
Solution:
This is a known bug, and it is fixed starting with Radiant 2023.2 or later.