In versions before 26.2-pre-3, when you did an f3 debug combination such as f3+t, it would only reload resources. Now it reloads resources and opens chat. This may have been caused by a fix to MC-308426 and I believe this is an unintended side effect of this change.
Steps to reproduce:
Load into a world with default hotkeys
Press F3+T
❌ It opens chat after reloading resources.
related to MC-308127 but not a duplicate since it is using unsupported debug features