Most of the groups I know give other groups 2 months to update a series and if there are no updates within 2 months, then the series is considered dropped by the other group and up for grabs unless someone gets in contact with you specifically.
And also personally- I feel like if it's been 2 months, even if the other group contacts you, unless they are DONE with a chapter and ready to post within the next day or two, it might be worth ignoring them anyways.
Most of the groups I know give other groups 2 months to update a series and if there are no updates within 2 months, then the series is considered dropped by the other group and up for grabs unless someone gets in contact with you specifically.
And also personally- I feel like if it's been 2 months, even if the other group contacts you, unless they are DONE with a chapter and ready to post within the next day or two, it might be worth ignoring them anyways.