I've never had that issue before, so it might be because of your computer, unless other people have this problem too.
yeah, i'm on a chromebook and it happens when you click reply on a comment. for it to not do that all you have to do is click somewhere other then the text box so you aren't typing anymore and then click back on it and it won't do it. but that doesn't permanently fix it, it just fix's it so it doesn't happen on that comment. it's a really annoying bug
and it's not because of a chrome book or because of certain things a school might have installed. i played free rider on my moms pc one time and that was my first experience with free rider ads (it really sucks and i feel sorry for the people that have to go through it every time they play) but the bug was still happening. i have also played it on my tablet (web version with ads because i don't have an ad-blocker) and the bug happened on that too. so i'm pretty sure it's on all devices.
i have seen it happen when i switch between this profile and NexusRider but before that it has never happened and it hasn't happened without me switching between the 2 profiles