Import issue corrupted import

Hi I exported an edited assembled MP3 file. Segment 1 of my radio show. Went to assemble all three segments and Audacity is not importing the final version of the file. But it is imported as the first and not the final version. It is Audacity that is the issue as the correct file plays on Player correctly.
I have even unistalled and reinstalled and there’s no change to this error. It’s like Audacity has a cached version that can’t be overriden by subsequent versions. Please help. Version 3.6.3.