No idea. Both of those are major version updates so it could have been in either one. The Qt development and deployment architectures changed quite a lot going from 4 to 5.I do not know where how/where the change to "with time zone" occurred. Maybe in the upgrade from postresql 9.3 to 12. Qt4 to Qt5?
Glad you were able to resolve the problem. Sorry I could be of more help.
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