A couple of bugs I noticed in the D&DB char builder

MotM's Harengon's bonus to initiative doesn't stack with the bonus from the 2024 Alert origin feat. I don't see why it shouldn't.
Both of them say "you add your proficiency bonus to your initiative". None of them says "your initiative is your DEX mod + your PB", or anything like that.

I also noticed an issue with the Fighter's Action surge not being given a second one at level 17 if you multiclass and your Fighter level is below that level.
It says you get a second one at level 17, and that's it. Not Fighter level. It's basically worded in the same way as Eldritch Blast and other attack cantrips.

Re: the initiative bonus

The Bonus Doesn't Stack

Your Proficiency Bonus can’t be added to a die roll or another number more than once. 

It's not a bug, it's explicitly prohibited by the rules.

And regarding Action Surge, two uses is very explicitly a 17th level fighter feature, as indicated by the fighter table

Neither of these are bugs

Oh I didn't realize that. Thank you for the precisions.