In the new MSP (Microsoft Project) Driver, custom views are not saved in the project. When you change a project view and then save the project back to Clarity and reopen the project in MSP, that view is lost. In the legacy version of the MSP connector, this did not happen.
In the new driver, customized views are no longer saved in the MPP (Microsoft Project project) file. You can instead create any custom views (and the associated tables) and place them in the global.mpt file.
Example on how to do that using the Gantt Chart view type: