Hidden Development resets to 0 or never gains snaps

i started a offline carolina franchise and legette, brooks, etc. are all star dev but reverted back to hidden. it seems this was an issue few years ago as well but this is frustrating. theres a way to fix it by manually turning them back once their rookie year is complete but i wonder if its a long term thing or a glitch that eventually goes away. never had this bug ever in any of my franchises and have always done offline franchise.