Line 群組打不開 - iOS

早安。
今天早上同事的Line裡面某個群組打不開
其他群組及對話視窗都可以正常使用，
就這個群組打不開

試過：刪除群組對話視窗、踢出群組再加回、app重開、手機重新開機

不知道有沒有人遇過類似的事情，
再找不到辦法就要重新建群組了
謝謝大家。

手機型號：iPhone X
iOS 版本：11.4.1
Line版本：9.5.0


另一個同事也遇到一樣的事情
手機型號：iPhone 7+
iOS 版本：12.2
Line版本：9.5.0

--
Look at the stars, look how they shine for you
And everything that you do, yeh they were all YELLOW
I came along, i wrote a song for you
and all the things you do, and it was called YELLOW
And so i took my turn, oh what a thing to have done,
And it was all YELLOW.

--