Safari 18.6 crashing on MacBook Air M2

My MacBook Air M2 has MacOs Sequoia 15.7.1 running Safari 18.6 (NOT Safari 26). Recently, any time that I enter information into a web-based form (have tried on several different websites), Safari crashes either immediately on the first data entry, or when try to submit a completed form.

Anybody else experienced this problem? How do I fix it?