Rogue Liberal MP Andrew Hastie has been rebuked by a backbencher after he quit the shadow cabinet, with calls for unity mounting as the party deals with the fallout.

As Liberal MPs gathered for the first time since Mr Hastie resigned from the front bench on Friday to allow him to speak more freely on immigration, Victorian MP Mary Aldred warned the party could lose further seats if infighting continued.

Ms Aldred reportedly expressed disappointment with Mr Hastie's resignation, telling MPs she came to parliament to "fight Labor" and not themselves.

The internal divisions within the Liberal Party and the resignation of Mr Hastie were not brought up during a joint party room meeting of the Liberals and Nationals before parliament sitting on Tuesday.

Liberal senator Michaelia Cash said th

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