Just re-established contact, need advice regarding facebook

So I just re-established contact with my ex after 30 days of no contact. Simply told her a videogame we used to play together reminded me of her for the first time in awhile and it made me smile. Hoped she was doing well.

Within 30 min, she replied very positively. Stated she had been playing that videogame too and had been thinking about me too recently. She then asked me a friendly question about the game.

I answered the question and then told her that I had to go and we could talk further later. (I wanted to keep things brief and to only show her that i had thought positively about her and that I was ok with talking again).

I didn’t check my messages for the rest of the day (I didn’t want to wait around for any further response as I figured it’d just be something like “ok talk to you later”)

When I finally checked my messages I saw she had sent me two more messages. She had responded 30min after I sent her my message that said that I had to go. Her first message spoke briefly again about the videogame that she played and then stated too that she had to go and told me to have a nice day.

The final message is where I need some help. 30 minutes after stating that she had to go, she sent another message saying “oh by the way some day, you’ll have to tell me why you blocked me on facebook.. :/”

The truth is, I never blocked her from facebook. The very first day that I started no contact with her, she got very angry that I wasn’t replying to her messages. By the end of the first day, she told me that since I was ignoring her, she was done with me. So, she removed me as a facebook friend. After she unfriended me, I felt pretty bad about things, so I sent her a brief message that simply said “I need some space to deal with things.” This is when my 30 days started.

During the 30 days, I never contacted her. However, I had some difficulty preventing myself from looking at her facebook. So I deactivated my own facebook profile to help myself. I kept it deactivated for the final week and a half of my 30 days. This worked for me and I haven’t looked at her facebook since. I have since reactivated my facebook.

Now regarding her message about blocking her, I think she must have went to my facebook during that week and a half. She must have seen my profile no longer was coming up and she assumed I had blocked her.

I don’t know how to respond to her claim of me blocking her or if I even should. I really don’t want to talk about anything that could start a negative conversation like this. Is it bad if I don’t address it? She did say “some day”, so it’s not like she needs an answer any time soon.