Table Editor doesnt update correctly for extension property ADD / REMOVE

1) Create a new Model Project and import the attached model (RestBooksToo.xmi). This model has 7.4 style REST extension properties defined on the procedure. 2) open the model, then select the Table Editor > Procedures tab. You will see the ext-custom:URI and ext-custom:Rest Method property columns. 3) In Model Explorer, select the 'getAllBooks' procedure then rt-click > Modeling > Disable REST for Procedures. The Table Editor procedures tab refreshes correctly to remove the rest columns. 4) In Model Explorer, reselect the 'getAllBooks' procedure - rt-click > Modeling > Enable REST for Procedures. The Table Editor procedures tab did NOT update (see in properties panel that ext props were added). Closing and re-opening the model editor at this point will force the table editor to rebuild correctly. 5) Finally, reselect the 'getAllBooks' procedure - rt-click > Modeling > Disable REST for Procedures. Again the Table Editor procedures tab does NOT update (see in props panel that ext properties were removed)