Behr is your problem. Behr is one of the worst paints on the market and belive me it will do exactly this.
You need to get rid of the Behr and get a paint from a "paint store" not a home center type place.
Paint is one of the products that expense does make the difference.
This happens with Behr and it has happened with me. If someone wants a room painted and painted only with Behr, then I pass on the job. No questions asked.
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