Contributor

After using Teams heavily since the start of the pandemic I have noticed an anomaly in regard to chats, whether they are one-to-one or one-to-many.
In the case of some that have experienced a lot of activity I no longer seem to be able to post files, screenshots, images, video...any attachment. They all refuse to upload and I get a 'Failed to send' message. It is as if I can only post a fixed number of attachments in any particular chat and in some cases I have hit that limit.
Is this a setting somewhere?