Help iphone user can't group chat with me

[Android Question]

I have been in a group message for weeks with two other iphone users. User #1 suddenly does not receive ANY texts from the group (including the other iphone user). User #1 also suddenly cannot get picture messages from me in a direct message, but she can get my texts in a direct message. User #2 (iphone) and I can see each other's texts, and User #1's texts in the group message, but User #1 can't see any of ours. Thoughts?

 

[Crashdamage]

User #1 is the one that has a problem. She should contact her service provider.

 

[EarlyMon]

User #1 is the one that has a problem. She should contact her service provider.

I agree, nonetheless, I've seen Textra SMS solve at least part of this for people.

Check its settings to make group messages MMS only.

 

[Borkie]

I do use Textra (love it!)

It seems to be a problem with ios8 and Android. User #1 has ios8, User #2 has an older version of ios.