<human>: Six months ago, my then-gf of 2 years and I broke up because I had a short-term bout of depression that I have since recovered from.  We then ceased contact entirely for 5 months.

However, over the past month or so, the following conversation pattern has emerged 3 or 4 times:
1.) She messages me out of the blue
2.) We have a disinterested 15 minute chat about current events / where we are in life
3.) I start to feel uncomfortable and make an excuse about getting back to work, using the phrase "talk to you later"
4.) She responds with the one-word "okay"
5.) Rinse and repeat a 10 days later

This pattern confuses me because item #1 seems irreconcilable with the "disinterested" in item 2 and item 4.  What would (if anything) this pattern indicate about how she feels towards me?

Can you condense the text into a few key points?
<bot>: Ex-gf messages me out of the blue with disinterested conversion and one-word goodbyes.  What does this reveal about how she feels towards me?