Add bugfix for single data byte running status, add unit test

[beserge]

fixes #521

[github-actions[bot]]

Unit Test Results

    1 files  ±0    16 suites  ±0   0s :stopwatch: ±0s 150 tests +1  150 :heavy_check_mark: +1  0 :zzz: ±0  0 :x: ±0 

Results for commit ecc39ede. ± Comparison against base commit 363dffc9.

:recycle: This comment has been updated with latest results.