Limit check waiting generally return an Failed message. There are two main reasons leading to limit check waiting:
Your messages fall into the period of time of Quiet Hours and Message Break at the same time.
In case your delivery time zone is Fixed time zone. Please check the period of time of Quiet Hours and Message Break in Message Delivery setting and then adjust your delivery time.
In case you choose Follower`s time zone. We highly recommend that If you have a lot of followers in the country that fall into Quite hours as well as Message break on your list, then create a separate campaign for them with Fixed time zone and adjust your delivery time.
If you need some more helps, please feel free to contact us via live chat or email us at firstname.lastname@example.org.