When linking a pin to chat, all pins show as the first pin set. Removing all pins and setting a new pin still causes the issue.

Reproduction steps:

• Set a pin (A)
• Set another pin (B)
• Attempt to link the second pin (B) to chat
• Chat pin will be the first pin (A)
• Remove all pins
• Set a new pin (C)
• Attempt to link the new pin (C) to chat
• Chat pin will be the first pin (A)

Thanks for reporting that bug. I was able to reproduce it and I found a fix for that.
With the release of 9.1 several new performance related problems appeared. I'll try to get them fixed asap and will publish a new release including the fix for your problem.