TST: Add tests for old issues 2
- [x] closes #14467
- [x] closes #14564
- [x] closes #14773
- [x] closes #15036
- [x] closes #15106
- [x] closes #15239
- [x] closes #15273
- [x] tests added / passed
- [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them

