URLs: any observation, tested on https://www.inaturalist.org/observations/25313156 to confirm without bothering anyone else.
Screenshots of what you are seeing:
Description of problem:
When writing a date in a comment field, such as when I typed the text seen in the first screenshot, something tries to parse the date. When this fails, the entire comment is replaced with “Invalid date”.
Step 1: Submit a comment on an observation, containing a date
Step 2: Wait a few seconds