If u hold the sideways upper arrow\button when sprinting and click the chat button at the same time when u exit chat ull start to be auto moving whatever side arrow u clicked. Hope you get it fixed ;D (cant rlly include a screenshot id need more like a 5 sec clip)
Thank you for your report!
However, this issue has been closed as a Duplicate of MCPE-25760.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Feedback – 📖 Game Wiki