Why did he call me but then proceeded to block me when I didn't pick up?

He called me after 37 days of no contact AT ALL. When he calls me again, my mother was using my phone (obviously I knew this, she was looking for some pictures and I lend it to her), so I was at the bathroom and ofc she saw the call. Since she knows I asked him many times to not call me anymore, she decided to get in the middle and made herself heard. After that, he's the one to block me. Why would he call me just so that I end up blocked? Would he call again? I honestly would love for him to stop. Until now, NO calls at all. It's been 3 weeks of this incident

Why did he call me but then proceeded to block me when I didn't pick up?
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