Sorting tasks list by date column results in wrong order

Steps to reproduce

1.  Import tasks from the attached files
2. Open tasks app (tab all)
3. Apply descendent order in column last change

Expected results

Tasks are correctly ordered by date

Actual results

At the bottom of the list, tasks from 2020 and 2021 are mixed

Development notes

During our tests, we observed the issue does not occur in one of our local environments. Libs, Java version, OS and Tomcat version are just the same than the rest of environments that reproduce the issue.