To quickly sort out the issue:
- record a demo and post a link to it here
- tell when this happens
As a general advice: keep calm in game with the player, don't fight back or you may be kicked by the ingame bot.
To upload a demo, use https://easyupload.io/ or any other site.
Please read Urban Terror's FAQ to know how to record a demo: https://www.urbanterror.info/support/116-play/#1