I think some of the blame _definitely_ lies with me. No doubt. The only sure fire way I've found that won't cause offence is to offer up a slack call/huddle so that they can hear my tone.
I have been failing quite successfully at communicating my tone over text for some time now, so I confess that and admit it upfront.
I have been failing quite successfully at communicating my tone over text for some time now, so I confess that and admit it upfront.