Just, you know, don't line-break arbitrarily. It looks stupid and hinders reading flow. Generally, split between syllables, at prefixes and suffixes (but: "inflec-ted", not "inflect-ed"), between doubled consonants, that sort of thing.
I get it, putting horizontal text into vertical bubbles is a challenge, but none that should make readability suffer. Thanks for the hard work and for getting back on this.