Hi Suhaas,
If you want to point 1.22, you should include the patch number as well. Whether it is 1.22.0, 1.22.1, 1.22.2, 1.22.3 etc...
it should be -/sap/bc/ui5_ui5/sap/myapp/1.22.0/resources/sap-ui-core.js //if it is 1.22.0 it should be -/sap/bc/ui5_ui5/sap/myapp/1.22.3/resources/sap-ui-core.js //if it is 1.22.3
For more info -
Documentation/ReleaseNotes/ReleaseNotes-1.22 – SAPUI5 Wiki (TIP CORE User Interface)
Versions available on SAP HANA cloud platform -
Available SAPUI5 versions on SAP HANA Cloud Platform
I don't think it is a best practice to have two different libraries in different instances. It's better to move to one library version in common for all instances (Dev., QA and PrD).
Regards,
Sai Vellanki.