What are some signs that a therapist may have poor boundaries with their clients?

Obsessing about clients outside of work hours.

These items can happen fleetingly, briefly, in any therapy, but if they’re frequent, it’s definitely time for the therapist to get some good, solid supervision/consultation.

Off the top of my ancient head:

Are you struggling with weight loss and finding it hard to stay consistent? What’s your biggest challenge when trying to lose weight at home?

Routinely going over the time limit with certain patients, compromising the time for the next client.

Frequent phoning or texting of clients to “check up on them and make sure they’re OK.”

Failing to mention the client in supervision/consultation, out of fear the supervisor/consultant will advise return to ordinary healthy boundaries.

French Open: No. 1 Aryna Sabalenka ends Swiatek's reign and meets No. 2 Coco Gauff for the trophy - AP News

Eager anticipation (or anxious anticipation) of the next session in ways that distract.

General Introduction to Boundaries from Panahi Counseling:

Disclosing feelings, fantasies, and experiences to the client in ways not related to the work the client is engaged in.

Million-Dollar Project Aims to Expose Bad Medical Research - Gizmodo

Session-expressed curiosities about client details not relevant to the therapy.

Sense of competition with persons who are important in the client’s life.

Serious disappointment when the client cancels a session.

What happens if someone fills up their car at the pump but leaves without paying? How is this situation typically handled?

Struggling with fantasies of deeper connections with clients, whether sexual or parental or other intense or intimate relationships beyond psychotherapy.