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

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

Off the top of my ancient head:

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

Do all therapists specialize in one specific type of therapy, or are they trained in multiple types?

Obsessing about clients outside of work hours.

Serious disappointment when the client cancels a session.

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

Why doesn't California have the tools, people, means to put out these fires even though they know there will be fires every year?

General Introduction to Boundaries from Panahi Counseling:

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

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

Can a twin flame runner be happy in a karmic relationship?

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.

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

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

What was the worst spanking you got growing up?

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