Big Sur 11.2.1 / Messages 14.0 Text Mangling Bug

Occasionally, when I draft text messages on Messages 14.0 (macOS Big Sur 11.2.1) on the new Macbook Air (M1), writing new words will rewrite previously written text with random characters like , ' a etc.

For example, suppose I draft a message to a group chain "Yeah, I think the next stimulus package needs" and then I continue to write "be bigger," partway through writing "be bigger" the app may rewrite "needs" to "ne,da." This is an example drawn from memory, rather than a specific instance, so might be useful in describing the behavior but less useful in figuring out why it's happening.

The problem fixes itself, temporarily, when I quit and restart Messages, but this has happened at least three times now in the span of two weeks. It's really annoying.