- Updated History constructor to check for invalid BLOB before copying History BLOB to output cube [#4966](https://github.com/DOI-USGS/ISIS3/issues/4966)
- Updated photomet MinnaertEmpirical model to support photemplate-style PVL format [#3621](https://github.com/DOI-USGS/ISIS3/issues/3621)
- Fixed downloadIsisData script copying existing files with every rclone download [#5245](https://github.com/DOI-USGS/ISIS3/issues/5245)
- Fixed gaussstretch segmentation fault error and refactored gaussstretch files/tests to use gtest [#5240](https://github.com/DOI-USGS/ISIS3/issues/5240)
- Fix matrix inversion errors in <i>findfeatures</i> due to bad FASTGEOM matrix transforms using a more robust implementation to detect these errors and throw exceptions. Images with these errors are captured and logged to the <b>TONOTMATCHED</b> file. Fixes [#4639](https://github.com/DOI-USGS/ISIS3/issues/4639)
- Fixed <i>findfeatures</i> use of projected mosaics with correct check for <b>TargetName</b> in the Mapping labels. [#4772](https://github.com/DOI-USGS/ISIS3/issues/4772)