Mail on my MacBook Pro is clunky
My email is clunky acting when I type, often making a long time for response and then it works again, particularly using caps.
MacBook Pro 16″, macOS 14.6
When was the last time you restarted your MacBook Pro?
If a simple reboot of your Mac doesn’t fix things, see if the problem still happens in safe mode.
How to use safe mode on your Mac - Apple Support
Safe mode will often correct weird software behavior. When you're in safe boot, the machine won’t be at its best performance, especially with graphics, but that's expected.
Does the same thing happen while in Safe mode?
You can exit safe mode by restarting your Mac normally, then reevaluate the problem.