You meant it as a joke. They read it as a jab. Their screen got the final draft.

Intent does not travel with a message. You send the tone in your head and they receive plain text, badly timed, read in whatever mood they were already in, and their version is the only one that exists for them. Explaining afterwards rarely undoes the first reading. The joke you meant is not available to them.

When something you wrote lands wrong, skip the part about how you meant it and go to the apology. Save teasing for people who can hear your voice. If a line needs tone to be funny, say it out loud instead of typing it.