DeepSeek PC mixes chats across windows (2026)
Name each window before a long run.
Do not paste a second task into the same thread.
Close idle windows to avoid the wrong reply.
Update the client if titles swap on their own.
Note which window stayed stable.
Change one variable at a time and confirm what actually helped.
If a company policy is involved, rule that out before chasing client settings.
Write the working steps into a short checklist for next time.
Export or screenshot a good setup so reinstalls are faster.
If it still flakes, retest on a clean network such as phone hotspot.