It can be heads or tails. You have a 50% chance each time you flip, yet you can have several flips in a row where you either get only heads or tails. It's only when the sample size is large enough that it actually approaches 1:2. That, ofc, is with a hypothetical coin - one that is perfectly balanced. In practice, using a computer, the random number generator will have an implicit bias towards a particular distribution, favouring some numbers more than others, regardless of what the stated probability is. Kind of like a real-world coin - imperfections make it more likely to fall one way or the other.
So, it gets weird. (Assuming there isn't a bug with the calc, anyway.)
Stationary radio units (all of them) do not transmit. You can still listen someone's broadcast but can't answer. Handheld walkie in your hand is the only way you can broadcast something now.
If you place walkie on the ground you still can recieve, but can't transmit (even on the same tile, so this is not a proximity issue).
I've noticed it earlier (couple updates ago) but postponed the reporting assuming that it's been a known bug for some reason. But apparently it's not, at least I can't find any reports here.