Why would a past client ignore you who you never had a falling out with?

There’s this girl where I was one of her clients last year for her business and we’ve kept in touch since then about some potential opportunities. Anyway, I wanted to use one of her services again (video editing) and she ignored my texts. She posts on Instagram though. I’m pretty pissed becuase I was one of her first ever clients and allowed her to use the videos for her portoflio and even sent a nice testimonial. I’m always supportive of others who have a small business. I also just started a website business and asked if she wanted to partner on any upcoming projects or at least spread the word if she knows anyone.
She went through a difficult time in her life like end of last year (divorce) so I don't know if that’s a factor and now she’s uncomfortable around certain people. But I didn’t do anything wrong to warrant being ignored. I was a good client, paid on time, said good things, etc. Is this unprofessional to ignore someone?

Why would a past client ignore you who you never had a falling out with?
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