When using Rsubread v 1.28.1 it sucessfully parsed my input file names by removing the file path and just keeping the names. As of the current version, however, the names contain the entire file path, this makes for very long and ugly column names.
Example
Setup
files: /path/to/file/here/file1.bam; /path/to/file/here/file2.bam countData=featureCounts(.....)
1.28.1
colnames(countData$counts)
[1] file1.bam
[2] file2.bam
1.34.0
colnames(countData$counts) [1] X.path.to.file.here.file1.bam [2] X.path.to.file.here.file2.bam