I forget where, but a while ago someone (I think MikeT) said he was going to monitor one of his young injured players to see if initial development time was lost during an injury, or simply paused. I didn't follow up on that, but thought it was an interesting question. Recently I had a young player go down for 200+ days and sent a ticket to ask about this situation.

The answer (eventually) was that development time is lost.

My suggestion is to change this. A player already takes a ratings hit from the injury itself. There's no problem with that. But, what's the rationale behind having a player lose out on development time? Initial development time isn't restricted by consecutive years, or by a certain age limit; rather it's restricted by the amount of information and experience that exists at a players disposal...which can happen at any point during their career. I can see it being connected to "make-up" rating, but to just be lost is just an oversight of how development plays out in HBD.

From what I remember there was a similar situation in HD years ago, which WIS eventually fixed after much complaining and denial. 

I'm not sure that they lose development time.  Hardball Dynasty – Fantasy Baseball Sim Games - Player Profile: Rafael Arias looks pretty normal in terms of development but he only lost about 50 innings in S21. 

On the other hand, Hardball Dynasty – Fantasy Baseball Sim Games - Player Profile: Patrick Mecir has been decimated by injuries.   I thought he was a 6th round steal with a shot at being a short reliever for a few seasons.   That looks like a pipe dream now.

Hardball Dynasty – Fantasy Baseball Sim Games - Player Profile: Gabe Schneider has been hit pretty hard and has missed approximately 40% of his career on the DL.    He doesn't look too off but I his glove/arm accuracy are considerably lower than I'd have expected.