Just keep posting and don't let it make you stop, after some time your activities will start counting again, but if it persists then you can try reaching out to the admin, but I doubt it'll get to that.
Yeah it can surely not get to that, some users do not even look at their activities count, if you are making posts which are of good quality and you are enjoying the forum, you would not even be looking closely at your activities count. The forum has its rules and how it operates, and even without understanding all of them, as long as you are not spamming, just know you are fine!