Missing beastmen seals

Hi I usually keep track of how many beastmen seals I have stored with the npc in jueno but my character greatone seems to be missing at least 800 seals since last time I checked I was at 2800+ and now I’m at just over 2000 is there a bug somewhere maybe? I haven’t used any at all can you please check thanks

No, they can't.

Perhaps you converted seals from one type to another and forgot about it. Seals don't just disappear. There's not been one instance i've ever heard of this ever, so it's extremely unlikely.