From lastest build release notes:
Changes concern the import of ticks performed via the terminal interface, as well as the update of ticks performed from MQL5 applications using the CustomTicks* function. Any changes in tick data lead to recalculation of the corresponding 1-minute bars of the custom symbol.
Issue posted here is related to the lack of it in previous build. Probably this "possible bug" mentioned might be solved. I will update as soon as I have it tested.